"Previous Section"_Section_start.html - "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc - "Next Section"_Section_packages.html :c :link(lws,http://lammps.sandia.gov) :link(ld,Manual.html) :link(lc,Section_commands.html#comm) :line 3. Commands :h3 This section describes how a LAMMPS input script is formatted and the input script commands used to define a LAMMPS simulation. 3.1 "LAMMPS input script"_#cmd_1 3.2 "Parsing rules"_#cmd_2 3.3 "Input script structure"_#cmd_3 3.4 "Commands listed by category"_#cmd_4 3.5 "Commands listed alphabetically"_#cmd_5 :all(b) :line :line 3.1 LAMMPS input script :link(cmd_1),h4 LAMMPS executes by reading commands from a input script (text file), one line at a time. When the input script ends, LAMMPS exits. Each command causes LAMMPS to take some action. It may set an internal variable, read in a file, or run a simulation. Most commands have default settings, which means you only need to use the command if you wish to change the default. In many cases, the ordering of commands in an input script is not important. However the following rules apply: (1) LAMMPS does not read your entire input script and then perform a simulation with all the settings. Rather, the input script is read one line at a time and each command takes effect when it is read. Thus this sequence of commands: timestep 0.5 run 100 run 100 :pre does something different than this sequence: run 100 timestep 0.5 run 100 :pre In the first case, the specified timestep (0.5 fmsec) is used for two simulations of 100 timesteps each. In the 2nd case, the default timestep (1.0 fmsec) is used for the 1st 100 step simulation and a 0.5 fmsec timestep is used for the 2nd one. (2) Some commands are only valid when they follow other commands. For example you cannot set the temperature of a group of atoms until atoms have been defined and a group command is used to define which atoms belong to the group. (3) Sometimes command B will use values that can be set by command A. This means command A must precede command B in the input script if it is to have the desired effect. For example, the "read_data"_read_data.html command initializes the system by setting up the simulation box and assigning atoms to processors. If default values are not desired, the "processors"_processors.html and "boundary"_boundary.html commands need to be used before read_data to tell LAMMPS how to map processors to the simulation box. Many input script errors are detected by LAMMPS and an ERROR or WARNING message is printed. "This section"_Section_errors.html gives more information on what errors mean. The documentation for each command lists restrictions on how the command can be used. :line 3.2 Parsing rules :link(cmd_2),h4 Each non-blank line in the input script is treated as a command. LAMMPS commands are case sensitive. Command names are lower-case, as are specified command arguments. Upper case letters may be used in file names or user-chosen ID strings. Here is how each line in the input script is parsed by LAMMPS: (1) If the last printable character on the line is a "&" character, the command is assumed to continue on the next line. The next line is concatenated to the previous line by removing the "&" character and line break. This allows long commands to be continued across two or more lines. See the discussion of triple quotes in (6) for how to continue a command across multiple line without using "&" characters. (2) All characters from the first "#" character onward are treated as comment and discarded. See an exception in (6). Note that a comment after a trailing "&" character will prevent the command from continuing on the next line. Also note that for multi-line commands a single leading "#" will comment out the entire command. (3) The line is searched repeatedly for $ characters, which indicate variables that are replaced with a text string. See an exception in (6). If the $ is followed by curly brackets, then the variable name is the text inside the curly brackets. If no curly brackets follow the $, then the variable name is the single character immediately following the $. Thus $\{myTemp\} and $x refer to variable names "myTemp" and "x". How the variable is converted to a text string depends on what style of variable it is; see the "variable"_variable.html doc page for details. It can be a variable that stores multiple text strings, and return one of them. The returned text string can be multiple "words" (space separated) which will then be interpreted as multiple arguments in the input command. The variable can also store a numeric formula which will be evaluated and its numeric result returned as a string. As a special case, if the $ is followed by parenthesis, then the text inside the parenthesis is treated as an "immediate" variable and evaluated as an "equal-style variable"_variable.html. This is a way to use numeric formulas in an input script without having to assign them to variable names. For example, these 3 input script lines: variable X equal (xlo+xhi)/2+sqrt(v_area) region 1 block $X 2 INF INF EDGE EDGE variable X delete :pre can be replaced by region 1 block $((xlo+xhi)/2+sqrt(v_area)) 2 INF INF EDGE EDGE :pre so that you do not have to define (or discard) a temporary variable X. Note that neither the curly-bracket or immediate form of variables can contain nested $ characters for other variables to substitute for. Thus you cannot do this: variable a equal 2 variable b2 equal 4 print "B2 = $\{b$a\}" :pre Nor can you specify this $($x-1.0) for an immediate variable, but you could use $(v_x-1.0), since the latter is valid syntax for an "equal-style variable"_variable.html. See the "variable"_variable.html command for more details of how strings are assigned to variables and evaluated, and how they can be used in input script commands. (4) The line is broken into "words" separated by whitespace (tabs, spaces). Note that words can thus contain letters, digits, underscores, or punctuation characters. (5) The first word is the command name. All successive words in the line are arguments. (6) If you want text with spaces to be treated as a single argument, it can be enclosed in either single or double or triple quotes. A long single argument enclosed in single or double quotes can span multiple lines if the "&" character is used, as described above. When the lines are concatenated together (and the "&" characters and line breaks removed), the text will become a single line. If you want multiple lines of an argument to retain their line breaks, the text can be enclosed in triple quotes, in which case "&" characters are not needed. For example: print "Volume = $v" print 'Volume = $v' if "$\{steps\} > 1000" then quit variable a string "red green blue & purple orange cyan" print """ System volume = $v System temperature = $t """ :pre In each case, the single, double, or triple quotes are removed when the single argument they enclose is stored internally. See the "dump modify format"_dump_modify.html, "print"_print.html, "if"_if.html, and "python"_python.html commands for examples. A "#" or "$" character that is between quotes will not be treated as a comment indicator in (2) or substituted for as a variable in (3). NOTE: If the argument is itself a command that requires a quoted argument (e.g. using a "print"_print.html command as part of an "if"_if.html or "run every"_run.html command), then single, double, or triple quotes can be nested in the usual manner. See the doc pages for those commands for examples. Only one of level of nesting is allowed, but that should be sufficient for most use cases. :line 3.3 Input script structure :h4,link(cmd_3) This section describes the structure of a typical LAMMPS input script. The "examples" directory in the LAMMPS distribution contains many sample input scripts; the corresponding problems are discussed in "Section 7"_Section_example.html, and animated on the "LAMMPS WWW Site"_lws. A LAMMPS input script typically has 4 parts: Initialization Atom definition Settings Run a simulation :ol The last 2 parts can be repeated as many times as desired. I.e. run a simulation, change some settings, run some more, etc. Each of the 4 parts is now described in more detail. Remember that almost all the commands need only be used if a non-default value is desired. (1) Initialization Set parameters that need to be defined before atoms are created or read-in from a file. The relevant commands are "units"_units.html, "dimension"_dimension.html, "newton"_newton.html, "processors"_processors.html, "boundary"_boundary.html, "atom_style"_atom_style.html, "atom_modify"_atom_modify.html. If force-field parameters appear in the files that will be read, these commands tell LAMMPS what kinds of force fields are being used: "pair_style"_pair_style.html, "bond_style"_bond_style.html, "angle_style"_angle_style.html, "dihedral_style"_dihedral_style.html, "improper_style"_improper_style.html. (2) Atom definition There are 3 ways to define atoms in LAMMPS. Read them in from a data or restart file via the "read_data"_read_data.html or "read_restart"_read_restart.html commands. These files can contain molecular topology information. Or create atoms on a lattice (with no molecular topology), using these commands: "lattice"_lattice.html, "region"_region.html, "create_box"_create_box.html, "create_atoms"_create_atoms.html. The entire set of atoms can be duplicated to make a larger simulation using the "replicate"_replicate.html command. (3) Settings Once atoms and molecular topology are defined, a variety of settings can be specified: force field coefficients, simulation parameters, output options, etc. Force field coefficients are set by these commands (they can also be set in the read-in files): "pair_coeff"_pair_coeff.html, "bond_coeff"_bond_coeff.html, "angle_coeff"_angle_coeff.html, "dihedral_coeff"_dihedral_coeff.html, "improper_coeff"_improper_coeff.html, "kspace_style"_kspace_style.html, "dielectric"_dielectric.html, "special_bonds"_special_bonds.html. Various simulation parameters are set by these commands: "neighbor"_neighbor.html, "neigh_modify"_neigh_modify.html, "group"_group.html, "timestep"_timestep.html, "reset_timestep"_reset_timestep.html, "run_style"_run_style.html, "min_style"_min_style.html, "min_modify"_min_modify.html. Fixes impose a variety of boundary conditions, time integration, and diagnostic options. The "fix"_fix.html command comes in many flavors. Various computations can be specified for execution during a simulation using the "compute"_compute.html, "compute_modify"_compute_modify.html, and "variable"_variable.html commands. Output options are set by the "thermo"_thermo.html, "dump"_dump.html, and "restart"_restart.html commands. (4) Run a simulation A molecular dynamics simulation is run using the "run"_run.html command. Energy minimization (molecular statics) is performed using the "minimize"_minimize.html command. A parallel tempering (replica-exchange) simulation can be run using the "temper"_temper.html command. :line 3.4 Commands listed by category :link(cmd_4),h4 This section lists core LAMMPS commands, grouped by category. The "next section"_#cmd_5 lists all commands alphabetically. The next section also includes (long) lists of style options for entries that appear in the following categories as a single command (fix, compute, pair, etc). Commands that are added by user packages are not included in the categories here, but they are in the next section. Initialization: "newton"_newton.html, "package"_package.html, "processors"_processors.html, "suffix"_suffix.html, "units"_units.html Setup simulation box: "boundary"_boundary.html, "box"_box.html, "change_box"_change_box.html, "create_box"_create_box.html, "dimension"_dimension.html, "lattice"_lattice.html, "region"_region.html Setup atoms: "atom_modify"_atom_modify.html, "atom_style"_atom_style.html, "balance"_balance.html, "create_atoms"_create_atoms.html, "create_bonds"_create_bonds.html, "delete_atoms"_delete_atoms.html, "delete_bonds"_delete_bonds.html, "displace_atoms"_displace_atoms.html, "group"_group.html, "mass"_mass.html, "molecule"_molecule.html, "read_data"_read_data.html, "read_dump"_read_dump.html, "read_restart"_read_restart.html, "replicate"_replicate.html, "set"_set.html, "velocity"_velocity.html Force fields: "angle_coeff"_angle_coeff.html, "angle_style"_angle_style.html, "bond_coeff"_bond_coeff.html, "bond_style"_bond_style.html, "bond_write"_bond_write.html, "dielectric"_dielectric.html, "dihedral_coeff"_dihedral_coeff.html, "dihedral_style"_dihedral_style.html, "improper_coeff"_improper_coeff.html, "improper_style"_improper_style.html, "kspace_modify"_kspace_modify.html, "kspace_style"_kspace_style.html, "pair_coeff"_pair_coeff.html, "pair_modify"_pair_modify.html, "pair_style"_pair_style.html, "pair_write"_pair_write.html, "special_bonds"_special_bonds.html Settings: "comm_modify"_comm_modify.html, "comm_style"_comm_style.html, "info"_info.html, "min_modify"_min_modify.html, "min_style"_min_style.html, "neigh_modify"_neigh_modify.html, "neighbor"_neighbor.html, "partition"_partition.html, "reset_timestep"_reset_timestep.html, "run_style"_run_style.html, "timer"_timer.html, "timestep"_timestep.html Operations within timestepping (fixes) and diagnostics (computes): "compute"_compute.html, "compute_modify"_compute_modify.html, "fix"_fix.html, "fix_modify"_fix_modify.html, "uncompute"_uncompute.html, "unfix"_unfix.html Output: "dump image"_dump_image.html, "dump movie"_dump_image.html, "dump"_dump.html, "dump_modify"_dump_modify.html, "restart"_restart.html, "thermo"_thermo.html, "thermo_modify"_thermo_modify.html, "thermo_style"_thermo_style.html, "undump"_undump.html, "write_coeff"_write_coeff.html, "write_data"_write_data.html, "write_dump"_write_dump.html, "write_restart"_write_restart.html Actions: "minimize"_minimize.html, "neb"_neb.html, "prd"_prd.html, "rerun"_rerun.html, "run"_run.html, "tad"_tad.html, "temper"_temper.html Input script control: "clear"_clear.html, "echo"_echo.html, "if"_if.html, "include"_include.html, "jump"_jump.html, "label"_label.html, "log"_log.html, "next"_next.html, "print"_print.html, "python"_python.html, "quit"_quit.html, "shell"_shell.html, "variable"_variable.html :line 3.5 Individual commands :h4,link(cmd_5),link(comm) This section lists all LAMMPS commands alphabetically, with a separate listing below of styles within certain commands. The "previous section"_#cmd_4 lists the same commands, grouped by category. Note that some style options for some commands are part of specific LAMMPS packages, which means they cannot be used unless the package was included when LAMMPS was built. Not all packages are included in a default LAMMPS build. These dependencies are listed as Restrictions in the command's documentation. "angle_coeff"_angle_coeff.html, "angle_style"_angle_style.html, "atom_modify"_atom_modify.html, "atom_style"_atom_style.html, "balance"_balance.html, "bond_coeff"_bond_coeff.html, "bond_style"_bond_style.html, "bond_write"_bond_write.html, "boundary"_boundary.html, "box"_box.html, "change_box"_change_box.html, "clear"_clear.html, "comm_modify"_comm_modify.html, "comm_style"_comm_style.html, "compute"_compute.html, "compute_modify"_compute_modify.html, "create_atoms"_create_atoms.html, "create_bonds"_create_bonds.html, "create_box"_create_box.html, "delete_atoms"_delete_atoms.html, "delete_bonds"_delete_bonds.html, "dielectric"_dielectric.html, "dihedral_coeff"_dihedral_coeff.html, "dihedral_style"_dihedral_style.html, "dimension"_dimension.html, "displace_atoms"_displace_atoms.html, "dump"_dump.html, "dump image"_dump_image.html, "dump_modify"_dump_modify.html, "dump movie"_dump_image.html, "echo"_echo.html, "fix"_fix.html, "fix_modify"_fix_modify.html, "group"_group.html, "if"_if.html, "info"_info.html, "improper_coeff"_improper_coeff.html, "improper_style"_improper_style.html, "include"_include.html, "jump"_jump.html, "kspace_modify"_kspace_modify.html, "kspace_style"_kspace_style.html, "label"_label.html, "lattice"_lattice.html, "log"_log.html, "mass"_mass.html, "minimize"_minimize.html, "min_modify"_min_modify.html, "min_style"_min_style.html, "molecule"_molecule.html, "neb"_neb.html, "neigh_modify"_neigh_modify.html, "neighbor"_neighbor.html, "newton"_newton.html, "next"_next.html, "package"_package.html, "pair_coeff"_pair_coeff.html, "pair_modify"_pair_modify.html, "pair_style"_pair_style.html, "pair_write"_pair_write.html, "partition"_partition.html, "prd"_prd.html, "print"_print.html, "processors"_processors.html, "python"_python.html, "quit"_quit.html, "read_data"_read_data.html, "read_dump"_read_dump.html, "read_restart"_read_restart.html, "region"_region.html, "replicate"_replicate.html, "rerun"_rerun.html, "reset_timestep"_reset_timestep.html, "restart"_restart.html, "run"_run.html, "run_style"_run_style.html, "set"_set.html, "shell"_shell.html, "special_bonds"_special_bonds.html, "suffix"_suffix.html, "tad"_tad.html, "temper"_temper.html, "thermo"_thermo.html, "thermo_modify"_thermo_modify.html, "thermo_style"_thermo_style.html, "timer"_timer.html, "timestep"_timestep.html, "uncompute"_uncompute.html, "undump"_undump.html, "unfix"_unfix.html, "units"_units.html, "variable"_variable.html, "velocity"_velocity.html, "write_coeff"_write_coeff.html, "write_data"_write_data.html, "write_dump"_write_dump.html, "write_restart"_write_restart.html :tb(c=6,ea=c) These are additional commands in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "dump netcdf"_dump_netcdf.html, "dump netcdf/mpiio"_dump_netcdf.html, "dump vtk"_dump_vtk.html, "group2ndx"_group2ndx.html, "ndx2group"_group2ndx.html, "temper/grem"_temper_grem.html :tb(c=3,ea=c) :line Fix styles :h4 See the "fix"_fix.html command for one-line descriptions of each style or click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "adapt"_fix_adapt.html, "addforce"_fix_addforce.html, "append/atoms"_fix_append_atoms.html, "atom/swap"_fix_atom_swap.html, "aveforce"_fix_aveforce.html, "ave/atom"_fix_ave_atom.html, "ave/chunk"_fix_ave_chunk.html, "ave/correlate"_fix_ave_correlate.html, "ave/histo"_fix_ave_histo.html, "ave/histo/weight"_fix_ave_histo.html, "ave/time"_fix_ave_time.html, "balance"_fix_balance.html, "bond/break"_fix_bond_break.html, "bond/create"_fix_bond_create.html, "bond/swap"_fix_bond_swap.html, "box/relax"_fix_box_relax.html, "cmap"_fix_cmap.html, "controller"_fix_controller.html, "deform (k)"_fix_deform.html, "deposit"_fix_deposit.html, "drag"_fix_drag.html, "dt/reset"_fix_dt_reset.html, "efield"_fix_efield.html, "ehex"_fix_ehex.html, "enforce2d"_fix_enforce2d.html, "evaporate"_fix_evaporate.html, "external"_fix_external.html, "freeze"_fix_freeze.html, "gcmc"_fix_gcmc.html, "gld"_fix_gld.html, "gravity (o)"_fix_gravity.html, "halt"_fix_halt.html, "heat"_fix_heat.html, "indent"_fix_indent.html, "langevin (k)"_fix_langevin.html, "lineforce"_fix_lineforce.html, "momentum (k)"_fix_momentum.html, "move"_fix_move.html, "mscg"_fix_mscg.html, "msst"_fix_msst.html, "neb"_fix_neb.html, "nph (ko)"_fix_nh.html, "nphug (o)"_fix_nphug.html, "nph/asphere (o)"_fix_nph_asphere.html, "nph/body"_fix_nph_body.html, "nph/sphere (o)"_fix_nph_sphere.html, "npt (kio)"_fix_nh.html, "npt/asphere (o)"_fix_npt_asphere.html, "npt/body"_fix_npt_body.html, "npt/sphere (o)"_fix_npt_sphere.html, "nve (kio)"_fix_nve.html, "nve/asphere (i)"_fix_nve_asphere.html, "nve/asphere/noforce"_fix_nve_asphere_noforce.html, "nve/body"_fix_nve_body.html, "nve/limit"_fix_nve_limit.html, "nve/line"_fix_nve_line.html, "nve/noforce"_fix_nve_noforce.html, "nve/sphere (o)"_fix_nve_sphere.html, "nve/tri"_fix_nve_tri.html, "nvt (iko)"_fix_nh.html, "nvt/asphere (o)"_fix_nvt_asphere.html, "nvt/body"_fix_nvt_body.html, "nvt/sllod (io)"_fix_nvt_sllod.html, "nvt/sphere (o)"_fix_nvt_sphere.html, "oneway"_fix_oneway.html, "orient/bcc"_fix_orient.html, "orient/fcc"_fix_orient.html, "planeforce"_fix_planeforce.html, "poems"_fix_poems.html, "pour"_fix_pour.html, "press/berendsen"_fix_press_berendsen.html, "print"_fix_print.html, "property/atom"_fix_property_atom.html, "python"_fix_python.html, "qeq/comb (o)"_fix_qeq_comb.html, "qeq/dynamic"_fix_qeq.html, "qeq/fire"_fix_qeq.html, "qeq/point"_fix_qeq.html, "qeq/shielded"_fix_qeq.html, "qeq/slater"_fix_qeq.html, "rattle"_fix_shake.html, "reax/bonds"_fix_reax_bonds.html, "recenter"_fix_recenter.html, "restrain"_fix_restrain.html, "rigid (o)"_fix_rigid.html, "rigid/nph (o)"_fix_rigid.html, "rigid/npt (o)"_fix_rigid.html, "rigid/nve (o)"_fix_rigid.html, "rigid/nvt (o)"_fix_rigid.html, "rigid/small (o)"_fix_rigid.html, "rigid/small/nph (o)"_fix_rigid.html, "rigid/small/npt (o)"_fix_rigid.html, "rigid/small/nve (o)"_fix_rigid.html, "rigid/small/nvt (o)"_fix_rigid.html, "setforce (k)"_fix_setforce.html, "shake"_fix_shake.html, "spring"_fix_spring.html, "spring/chunk"_fix_spring_chunk.html, "spring/rg"_fix_spring_rg.html, "spring/self"_fix_spring_self.html, "srd"_fix_srd.html, "store/force"_fix_store_force.html, "store/state"_fix_store_state.html, "temp/berendsen"_fix_temp_berendsen.html, "temp/csld"_fix_temp_csvr.html, "temp/csvr"_fix_temp_csvr.html, "temp/rescale"_fix_temp_rescale.html, "tfmc"_fix_tfmc.html, "thermal/conductivity"_fix_thermal_conductivity.html, "tmd"_fix_tmd.html, "ttm"_fix_ttm.html, "tune/kspace"_fix_tune_kspace.html, "vector"_fix_vector.html, "viscosity"_fix_viscosity.html, "viscous"_fix_viscous.html, "wall/colloid"_fix_wall.html, "wall/gran"_fix_wall_gran.html, "wall/gran/region"_fix_wall_gran_region.html, "wall/harmonic"_fix_wall.html, "wall/lj1043"_fix_wall.html, "wall/lj126"_fix_wall.html, "wall/lj93"_fix_wall.html, "wall/piston"_fix_wall_piston.html, "wall/reflect (k)"_fix_wall_reflect.html, "wall/region"_fix_wall_region.html, "wall/srd"_fix_wall_srd.html :tb(c=8,ea=c) These are additional fix styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "adapt/fep"_fix_adapt_fep.html, "addtorque"_fix_addtorque.html, "atc"_fix_atc.html, "ave/correlate/long"_fix_ave_correlate_long.html, "colvars"_fix_colvars.html, "dpd/energy"_fix_dpd_energy.html, "drude"_fix_drude.html, "drude/transform/direct"_fix_drude_transform.html, "drude/transform/reverse"_fix_drude_transform.html, "eos/cv"_fix_eos_cv.html, "eos/table"_fix_eos_table.html, "eos/table/rx"_fix_eos_table_rx.html, "filter/corotate"_fix_filter_corotate.html, "flow/gauss"_fix_flow_gauss.html, "gle"_fix_gle.html, "grem"_fix_grem.html, "imd"_fix_imd.html, "ipi"_fix_ipi.html, "langevin/drude"_fix_langevin_drude.html, "langevin/eff"_fix_langevin_eff.html, "lb/fluid"_fix_lb_fluid.html, "lb/momentum"_fix_lb_momentum.html, "lb/pc"_fix_lb_pc.html, "lb/rigid/pc/sphere"_fix_lb_rigid_pc_sphere.html, "lb/viscous"_fix_lb_viscous.html, "meso"_fix_meso.html, "manifoldforce"_fix_manifoldforce.html, "meso/stationary"_fix_meso_stationary.html, "nve/dot"_fix_nve_dot.html, "nve/dotc/langevin"_fix_nve_dotc_langevin.html, "nve/manifold/rattle"_fix_nve_manifold_rattle.html, "nvk"_fix_nvk.html, "nvt/manifold/rattle"_fix_nvt_manifold_rattle.html, "nph/eff"_fix_nh_eff.html, "npt/eff"_fix_nh_eff.html, "nve/eff"_fix_nve_eff.html, "nvt/eff"_fix_nh_eff.html, "nvt/sllod/eff"_fix_nvt_sllod_eff.html, "phonon"_fix_phonon.html, "pimd"_fix_pimd.html, "qbmsst"_fix_qbmsst.html, "qeq/reax (ko)"_fix_qeq_reax.html, "qmmm"_fix_qmmm.html, "qtb"_fix_qtb.html, "reax/c/bonds"_fix_reax_bonds.html, "reax/c/species"_fix_reaxc_species.html, "rx"_fix_rx.html, "saed/vtk"_fix_saed_vtk.html, "shardlow"_fix_shardlow.html, "smd"_fix_smd.html, "smd/adjust/dt"_fix_smd_adjust_dt.html, "smd/integrate/tlsph"_fix_smd_integrate_tlsph.html, "smd/integrate/ulsph"_fix_smd_integrate_ulsph.html, "smd/move/triangulated/surface"_fix_smd_move_triangulated_surface.html, "smd/setvel"_fix_smd_setvel.html, "smd/wall/surface"_fix_smd_wall_surface.html, "temp/rescale/eff"_fix_temp_rescale_eff.html, "ti/spring"_fix_ti_spring.html, "ttm/mod"_fix_ttm.html, "wall/ees"_fix_wall_ees.html, "wall/region/ees"_fix_wall_ees.html :tb(c=6,ea=c) :line Compute styles :h4 See the "compute"_compute.html command for one-line descriptions of each style or click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "angle"_compute_angle.html, "angle/local"_compute_angle_local.html, "angmom/chunk"_compute_angmom_chunk.html, "body/local"_compute_body_local.html, "bond"_compute_bond.html, "bond/local"_compute_bond_local.html, "centro/atom"_compute_centro_atom.html, "chunk/atom"_compute_chunk_atom.html, "cluster/atom"_compute_cluster_atom.html, "cna/atom"_compute_cna_atom.html, "com"_compute_com.html, "com/chunk"_compute_com_chunk.html, "contact/atom"_compute_contact_atom.html, "coord/atom"_compute_coord_atom.html, "damage/atom"_compute_damage_atom.html, "dihedral"_compute_dihedral.html, "dihedral/local"_compute_dihedral_local.html, "dilatation/atom"_compute_dilatation_atom.html, "dipole/chunk"_compute_dipole_chunk.html, "displace/atom"_compute_displace_atom.html, "erotate/asphere"_compute_erotate_asphere.html, "erotate/rigid"_compute_erotate_rigid.html, "erotate/sphere"_compute_erotate_sphere.html, "erotate/sphere/atom"_compute_erotate_sphere_atom.html, "event/displace"_compute_event_displace.html, "global/atom"_compute_global_atom.html, "group/group"_compute_group_group.html, "gyration"_compute_gyration.html, "gyration/chunk"_compute_gyration_chunk.html, "heat/flux"_compute_heat_flux.html, "hexorder/atom"_compute_hexorder_atom.html, "improper"_compute_improper.html, "improper/local"_compute_improper_local.html, "inertia/chunk"_compute_inertia_chunk.html, "ke"_compute_ke.html, "ke/atom"_compute_ke_atom.html, "ke/rigid"_compute_ke_rigid.html, "msd"_compute_msd.html, "msd/chunk"_compute_msd_chunk.html, "msd/nongauss"_compute_msd_nongauss.html, "omega/chunk"_compute_omega_chunk.html, "orientorder/atom"_compute_orientorder_atom.html, "pair"_compute_pair.html, "pair/local"_compute_pair_local.html, "pe"_compute_pe.html, "pe/atom"_compute_pe_atom.html, "plasticity/atom"_compute_plasticity_atom.html, "pressure"_compute_pressure.html, "property/atom"_compute_property_atom.html, "property/local"_compute_property_local.html, "property/chunk"_compute_property_chunk.html, "rdf"_compute_rdf.html, "reduce"_compute_reduce.html, "reduce/region"_compute_reduce.html, "rigid/local"_compute_rigid_local.html, "slice"_compute_slice.html, "sna/atom"_compute_sna_atom.html, "snad/atom"_compute_sna_atom.html, "snav/atom"_compute_sna_atom.html, "stress/atom"_compute_stress_atom.html, "temp (k)"_compute_temp.html, "temp/asphere"_compute_temp_asphere.html, "temp/body"_compute_temp_body.html, "temp/chunk"_compute_temp_chunk.html, "temp/com"_compute_temp_com.html, "temp/deform"_compute_temp_deform.html, "temp/partial"_compute_temp_partial.html, "temp/profile"_compute_temp_profile.html, "temp/ramp"_compute_temp_ramp.html, "temp/region"_compute_temp_region.html, "temp/sphere"_compute_temp_sphere.html, "ti"_compute_ti.html, "torque/chunk"_compute_torque_chunk.html, "vacf"_compute_vacf.html, "vcm/chunk"_compute_vcm_chunk.html, "voronoi/atom"_compute_voronoi_atom.html :tb(c=6,ea=c) These are additional compute styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "ackland/atom"_compute_ackland_atom.html, "basal/atom"_compute_basal_atom.html, "cnp/atom"_compute_cnp_atom.html, "dpd"_compute_dpd.html, "dpd/atom"_compute_dpd_atom.html, "fep"_compute_fep.html, "force/tally"_compute_tally.html, "heat/flux/tally"_compute_tally.html, "ke/eff"_compute_ke_eff.html, "ke/atom/eff"_compute_ke_atom_eff.html, "meso/e/atom"_compute_meso_e_atom.html, "meso/rho/atom"_compute_meso_rho_atom.html, "meso/t/atom"_compute_meso_t_atom.html, "pe/tally"_compute_tally.html, "pe/mol/tally"_compute_tally.html, "saed"_compute_saed.html, "smd/contact/radius"_compute_smd_contact_radius.html, "smd/damage"_compute_smd_damage.html, "smd/hourglass/error"_compute_smd_hourglass_error.html, "smd/internal/energy"_compute_smd_internal_energy.html, "smd/plastic/strain"_compute_smd_plastic_strain.html, "smd/plastic/strain/rate"_compute_smd_plastic_strain_rate.html, "smd/rho"_compute_smd_rho.html, "smd/tlsph/defgrad"_compute_smd_tlsph_defgrad.html, "smd/tlsph/dt"_compute_smd_tlsph_dt.html, "smd/tlsph/num/neighs"_compute_smd_tlsph_num_neighs.html, "smd/tlsph/shape"_compute_smd_tlsph_shape.html, "smd/tlsph/strain"_compute_smd_tlsph_strain.html, "smd/tlsph/strain/rate"_compute_smd_tlsph_strain_rate.html, "smd/tlsph/stress"_compute_smd_tlsph_stress.html, "smd/triangle/mesh/vertices"_compute_smd_triangle_mesh_vertices.html, "smd/ulsph/num/neighs"_compute_smd_ulsph_num_neighs.html, "smd/ulsph/strain"_compute_smd_ulsph_strain.html, "smd/ulsph/strain/rate"_compute_smd_ulsph_strain_rate.html, "smd/ulsph/stress"_compute_smd_ulsph_stress.html, "smd/vol"_compute_smd_vol.html, "stress/tally"_compute_tally.html, "temp/drude"_compute_temp_drude.html, "temp/eff"_compute_temp_eff.html, "temp/deform/eff"_compute_temp_deform_eff.html, "temp/region/eff"_compute_temp_region_eff.html, "temp/rotate"_compute_temp_rotate.html, "xrd"_compute_xrd.html :tb(c=6,ea=c) :line Pair_style potentials :h4 See the "pair_style"_pair_style.html command for an overview of pair potentials. Click on the style itself for a full description. Many of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "none"_pair_none.html, "zero"_pair_zero.html, "hybrid"_pair_hybrid.html, "hybrid/overlay"_pair_hybrid.html, "adp (o)"_pair_adp.html, "airebo (o)"_pair_airebo.html, "airebo/morse (o)"_pair_airebo.html, "beck (go)"_pair_beck.html, "body"_pair_body.html, "bop"_pair_bop.html, "born (go)"_pair_born.html, "born/coul/dsf"_pair_born.html, "born/coul/dsf/cs"_pair_born.html, "born/coul/long (go)"_pair_born.html, "born/coul/long/cs"_pair_born.html, "born/coul/msm (o)"_pair_born.html, "born/coul/wolf (go)"_pair_born.html, "brownian (o)"_pair_brownian.html, "brownian/poly (o)"_pair_brownian.html, "buck (gkio)"_pair_buck.html, "buck/coul/cut (gkio)"_pair_buck.html, "buck/coul/long (gkio)"_pair_buck.html, "buck/coul/long/cs"_pair_buck.html, "buck/coul/msm (o)"_pair_buck.html, "buck/long/coul/long (o)"_pair_buck_long.html, "colloid (go)"_pair_colloid.html, "comb (o)"_pair_comb.html, "comb3"_pair_comb.html, "coul/cut (gko)"_pair_coul.html, "coul/debye (gko)"_pair_coul.html, "coul/dsf (gko)"_pair_coul.html, "coul/long (gko)"_pair_coul.html, "coul/long/cs"_pair_coul.html, "coul/msm"_pair_coul.html, "coul/streitz"_pair_coul.html, "coul/wolf (ko)"_pair_coul.html, "dpd (go)"_pair_dpd.html, "dpd/tstat (go)"_pair_dpd.html, "dsmc"_pair_dsmc.html, "eam (gkiot)"_pair_eam.html, "eam/alloy (gkot)"_pair_eam.html, "eam/fs (gkot)"_pair_eam.html, "eim (o)"_pair_eim.html, "gauss (go)"_pair_gauss.html, "gayberne (gio)"_pair_gayberne.html, "gran/hertz/history (o)"_pair_gran.html, "gran/hooke (o)"_pair_gran.html, "gran/hooke/history (o)"_pair_gran.html, "gw"_pair_gw.html, "gw/zbl"_pair_gw.html, "hbond/dreiding/lj (o)"_pair_hbond_dreiding.html, "hbond/dreiding/morse (o)"_pair_hbond_dreiding.html, "kim"_pair_kim.html, "lcbop"_pair_lcbop.html, "line/lj"_pair_line_lj.html, "lj/charmm/coul/charmm (ko)"_pair_charmm.html, "lj/charmm/coul/charmm/implicit (ko)"_pair_charmm.html, "lj/charmm/coul/long (giko)"_pair_charmm.html, "lj/charmm/coul/msm"_pair_charmm.html, "lj/charmmfsw/coul/charmmfsh"_pair_charmm.html, "lj/charmmfsw/coul/long"_pair_charmm.html, "lj/class2 (gko)"_pair_class2.html, "lj/class2/coul/cut (ko)"_pair_class2.html, "lj/class2/coul/long (gko)"_pair_class2.html, "lj/cubic (go)"_pair_lj_cubic.html, "lj/cut (gikot)"_pair_lj.html, "lj/cut/coul/cut (gko)"_pair_lj.html, "lj/cut/coul/debye (gko)"_pair_lj.html, "lj/cut/coul/dsf (gko)"_pair_lj.html, "lj/cut/coul/long (gikot)"_pair_lj.html, "lj/cut/coul/long/cs"_pair_lj.html, "lj/cut/coul/msm (go)"_pair_lj.html, "lj/cut/dipole/cut (go)"_pair_dipole.html, "lj/cut/dipole/long"_pair_dipole.html, "lj/cut/tip4p/cut (o)"_pair_lj.html, "lj/cut/tip4p/long (ot)"_pair_lj.html, "lj/expand (gko)"_pair_lj_expand.html, "lj/gromacs (gko)"_pair_gromacs.html, "lj/gromacs/coul/gromacs (ko)"_pair_gromacs.html, "lj/long/coul/long (io)"_pair_lj_long.html, "lj/long/dipole/long"_pair_dipole.html, "lj/long/tip4p/long"_pair_lj_long.html, "lj/smooth (o)"_pair_lj_smooth.html, "lj/smooth/linear (o)"_pair_lj_smooth_linear.html, "lj96/cut (go)"_pair_lj96.html, "lubricate (o)"_pair_lubricate.html, "lubricate/poly (o)"_pair_lubricate.html, "lubricateU"_pair_lubricateU.html, "lubricateU/poly"_pair_lubricateU.html, "meam"_pair_meam.html, "mie/cut (o)"_pair_mie.html, "morse (gkot)"_pair_morse.html, "nb3b/harmonic (o)"_pair_nb3b_harmonic.html, "nm/cut (o)"_pair_nm.html, "nm/cut/coul/cut (o)"_pair_nm.html, "nm/cut/coul/long (o)"_pair_nm.html, "peri/eps"_pair_peri.html, "peri/lps (o)"_pair_peri.html, "peri/pmb (o)"_pair_peri.html, "peri/ves"_pair_peri.html, "polymorphic"_pair_polymorphic.html, "python"_pair_python.html, "reax"_pair_reax.html, "rebo (o)"_pair_airebo.html, "resquared (go)"_pair_resquared.html, "snap"_pair_snap.html, "soft (go)"_pair_soft.html, "sw (gkio)"_pair_sw.html, "table (gko)"_pair_table.html, "tersoff (gkio)"_pair_tersoff.html, "tersoff/mod (gko)"_pair_tersoff_mod.html, "tersoff/mod/c (o)"_pair_tersoff_mod.html, "tersoff/zbl (gko)"_pair_tersoff_zbl.html, "tip4p/cut (o)"_pair_coul.html, "tip4p/long (o)"_pair_coul.html, "tri/lj"_pair_tri_lj.html, "vashishta (ko)"_pair_vashishta.html, "vashishta/table (o)"_pair_vashishta.html, "yukawa (go)"_pair_yukawa.html, "yukawa/colloid (go)"_pair_yukawa_colloid.html, "zbl (go)"_pair_zbl.html :tb(c=4,ea=c) These are additional pair styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "agni (o)"_pair_agni.html, "awpmd/cut"_pair_awpmd.html, "buck/mdf"_pair_mdf.html, "coul/cut/soft (o)"_pair_lj_soft.html, "coul/diel (o)"_pair_coul_diel.html, "coul/long/soft (o)"_pair_lj_soft.html, "dpd/fdt"_pair_dpd_fdt.html, "dpd/fdt/energy"_pair_dpd_fdt.html, "eam/cd (o)"_pair_eam.html, "edip (o)"_pair_edip.html, "edip/multi"_pair_edip.html, "eff/cut"_pair_eff.html, "exp6/rx"_pair_exp6_rx.html, "gauss/cut"_pair_gauss.html, "kolmogorov/crespi/z"_pair_kolmogorov_crespi_z.html, "lennard/mdf"_pair_mdf.html, "list"_pair_list.html, "lj/charmm/coul/long/soft (o)"_pair_charmm.html, "lj/cut/coul/cut/soft (o)"_pair_lj_soft.html, "lj/cut/coul/long/soft (o)"_pair_lj_soft.html, "lj/cut/dipole/sf (go)"_pair_dipole.html, "lj/cut/soft (o)"_pair_lj_soft.html, "lj/cut/thole/long (o)"_pair_thole.html, "lj/cut/tip4p/long/soft (o)"_pair_lj_soft.html, "lj/mdf"_pair_mdf.html, "lj/sdk (gko)"_pair_sdk.html, "lj/sdk/coul/long (go)"_pair_sdk.html, "lj/sdk/coul/msm (o)"_pair_sdk.html, "meam/c"_pair_meam.html, "meam/spline (o)"_pair_meam_spline.html, "meam/sw/spline"_pair_meam_sw_spline.html, "mgpt"_pair_mgpt.html, "momb"_pair_momb.html, "morse/smooth/linear"_pair_morse.html, "morse/soft"_pair_morse.html, "multi/lucy"_pair_multi_lucy.html, "multi/lucy/rx"_pair_multi_lucy_rx.html, "oxdna/coaxstk"_pair_oxdna.html, "oxdna/excv"_pair_oxdna.html, "oxdna/hbond"_pair_oxdna.html, "oxdna/stk"_pair_oxdna.html, "oxdna/xstk"_pair_oxdna.html, "oxdna2/coaxstk"_pair_oxdna2.html, "oxdna2/dh"_pair_oxdna2.html, "oxdna2/excv"_pair_oxdna2.html, "oxdna2/stk"_pair_oxdna2.html, "quip"_pair_quip.html, "reax/c (ko)"_pair_reaxc.html, "smd/hertz"_pair_smd_hertz.html, "smd/tlsph"_pair_smd_tlsph.html, "smd/triangulated/surface"_pair_smd_triangulated_surface.html, "smd/ulsph"_pair_smd_ulsph.html, "smtbq"_pair_smtbq.html, "sph/heatconduction"_pair_sph_heatconduction.html, "sph/idealgas"_pair_sph_idealgas.html, "sph/lj"_pair_sph_lj.html, "sph/rhosum"_pair_sph_rhosum.html, "sph/taitwater"_pair_sph_taitwater.html, "sph/taitwater/morris"_pair_sph_taitwater_morris.html, "srp"_pair_srp.html, "table/rx"_pair_table_rx.html, "tersoff/table (o)"_pair_tersoff.html, "thole"_pair_thole.html, "tip4p/long/soft (o)"_pair_lj_soft.html :tb(c=4,ea=c) :line Bond_style potentials :h4 See the "bond_style"_bond_style.html command for an overview of bond potentials. Click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "none"_bond_none.html, "zero"_bond_zero.html, "hybrid"_bond_hybrid.html, "class2 (ko)"_bond_class2.html, "fene (iko)"_bond_fene.html, "fene/expand (o)"_bond_fene_expand.html, "harmonic (ko)"_bond_harmonic.html, "morse (o)"_bond_morse.html, "nonlinear (o)"_bond_nonlinear.html, "quartic (o)"_bond_quartic.html, "table (o)"_bond_table.html :tb(c=4,ea=c) These are additional bond styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "harmonic/shift (o)"_bond_harmonic_shift.html, "harmonic/shift/cut (o)"_bond_harmonic_shift_cut.html, "oxdna/fene"_bond_oxdna.html, "oxdna2/fene"_bond_oxdna.html :tb(c=4,ea=c) :line Angle_style potentials :h4 See the "angle_style"_angle_style.html command for an overview of angle potentials. Click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "none"_angle_none.html, "zero"_angle_zero.html, "hybrid"_angle_hybrid.html, "charmm (ko)"_angle_charmm.html, "class2 (ko)"_angle_class2.html, "cosine (o)"_angle_cosine.html, "cosine/delta (o)"_angle_cosine_delta.html, "cosine/periodic (o)"_angle_cosine_periodic.html, "cosine/squared (o)"_angle_cosine_squared.html, "harmonic (iko)"_angle_harmonic.html, "table (o)"_angle_table.html :tb(c=4,ea=c) These are additional angle styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "cosine/shift (o)"_angle_cosine_shift.html, "cosine/shift/exp (o)"_angle_cosine_shift_exp.html, "dipole (o)"_angle_dipole.html, "fourier (o)"_angle_fourier.html, "fourier/simple (o)"_angle_fourier_simple.html, "quartic (o)"_angle_quartic.html, "sdk"_angle_sdk.html :tb(c=4,ea=c) :line Dihedral_style potentials :h4 See the "dihedral_style"_dihedral_style.html command for an overview of dihedral potentials. Click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "none"_dihedral_none.html, "zero"_dihedral_zero.html, "hybrid"_dihedral_hybrid.html, "charmm (ko)"_dihedral_charmm.html, "charmmfsw"_dihedral_charmm.html, "class2 (ko)"_dihedral_class2.html, "harmonic (io)"_dihedral_harmonic.html, "helix (o)"_dihedral_helix.html, "multi/harmonic (o)"_dihedral_multi_harmonic.html, "opls (iko)"_dihedral_opls.html :tb(c=4,ea=c) These are additional dihedral styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "cosine/shift/exp (o)"_dihedral_cosine_shift_exp.html, "fourier (o)"_dihedral_fourier.html, "nharmonic (o)"_dihedral_nharmonic.html, "quadratic (o)"_dihedral_quadratic.html, "spherical (o)"_dihedral_spherical.html, "table (o)"_dihedral_table.html :tb(c=4,ea=c) :line Improper_style potentials :h4 See the "improper_style"_improper_style.html command for an overview of improper potentials. Click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "none"_improper_none.html, "zero"_improper_zero.html, "hybrid"_improper_hybrid.html, "class2 (ko)"_improper_class2.html, "cvff (io)"_improper_cvff.html, "harmonic (ko)"_improper_harmonic.html, "umbrella (o)"_improper_umbrella.html :tb(c=4,ea=c) These are additional improper styles in USER packages, which can be used if "LAMMPS is built with the appropriate package"_Section_start.html#start_3. "cossq (o)"_improper_cossq.html, "distance"_improper_distance.html, "fourier (o)"_improper_fourier.html, "ring (o)"_improper_ring.html :tb(c=4,ea=c) :line Kspace solvers :h4 See the "kspace_style"_kspace_style.html command for an overview of Kspace solvers. Click on the style itself for a full description. Some of the styles have accelerated versions, which can be used if LAMMPS is built with the "appropriate accelerated package"_Section_accelerate.html. This is indicated by additional letters in parenthesis: g = GPU, i = USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT. "ewald (o)"_kspace_style.html, "ewald/disp"_kspace_style.html, "msm (o)"_kspace_style.html, "msm/cg (o)"_kspace_style.html, "pppm (go)"_kspace_style.html, "pppm/cg (o)"_kspace_style.html, "pppm/disp (i)"_kspace_style.html, "pppm/disp/tip4p"_kspace_style.html, "pppm/stagger"_kspace_style.html, "pppm/tip4p (o)"_kspace_style.html :tb(c=4,ea=c)