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lammps/doc/src/pair_sph_taitwater_morris.txt
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pair_sph_taitwater_morris.txt
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"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)
:line
pair_style sph/taitwater/morris command :h3
[Syntax:]
pair_style sph/taitwater/morris :pre
[Examples:]
pair_style sph/taitwater/morris
pair_coeff * * 1000.0 1430.0 1.0 2.4 :pre
[Description:]
The sph/taitwater/morris style computes pressure forces between SPH
particles according to Tait's equation of state:
:c,image(Eqs/pair_sph_tait.jpg)
where gamma = 7 and B = c_0^2 rho_0 / gamma, with rho_0 being the
reference density and c_0 the reference speed of sound.
This pair style also computes laminar viscosity "(Morris)"_#Morris.
See "this PDF guide"_USER/sph/SPH_LAMMPS_userguide.pdf to using SPH in
LAMMPS.
The following coefficients must be defined for each pair of atoms
types via the "pair_coeff"_pair_coeff.html command as in the examples
above.
rho0 reference density (mass/volume units)
c0 reference soundspeed (distance/time units)
nu dynamic viscosity (mass*distance/time units)
h kernel function cutoff (distance units) :ul
:line
[Mixing, shift, table, tail correction, restart, rRESPA info]:
This style does not support mixing. Thus, coefficients for all
I,J pairs must be specified explicitly.
This style does not support the "pair_modify"_pair_modify.html
shift, table, and tail options.
This style does not write information to "binary restart
files"_restart.html. Thus, you need to re-specify the pair_style and
pair_coeff commands in an input script that reads a restart file.
This style can only be used via the {pair} keyword of the "run_style
respa"_run_style.html command. It does not support the {inner},
{middle}, {outer} keywords.
[Restrictions:]
This pair style is part of the USER-SPH package. It is only enabled
if LAMMPS was built with that package. See the "Making
LAMMPS"_Section_start.html#start_3 section for more info.
[Related commands:]
"pair_coeff"_pair_coeff.html, pair_sph/rhosum
[Default:] none
:line
:link(Morris)
[(Morris)] Morris, Fox, Zhu, J Comp Physics, 136, 214-226 (1997).
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