pair_sph_lj.html
No OneTemporary
Actions

Subscribers

None

File Metadata

Created: Wed, Nov 27, 12:41

pair_sph_lj.html
View Options

	<HTML>
	<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
	</CENTER>






	<HR>

	<H3>pair_style sph/lj command
	</H3>
	<P><B>Syntax:</B>
	</P>
	<PRE>pair_style sph/lj
	</PRE>
	<P><B>Examples:</B>
	</P>
	<PRE>pair_style sph/lj
	pair_coeff * * 1.0 2.4
	</PRE>
	<P><B>Description:</B>
	</P>
	<P>The sph/lj style computes pressure forces between particles according
	to the Lennard-Jones equation of state, which is computed according to
	Ree's 1980 polynomial fit <A HREF = "#Ree">(Ree)</A>. The Lennard-Jones parameters
	epsilon and sigma are set to unity. This pair style also computes
	Monaghan's artificial viscosity to prevent particles from
	interpentrating <A HREF = "#Monoghan">(Monaghan)</A>.
	</P>
	<P>See <A HREF = "USER/sph/SPH_LAMMPS_userguide.pdf">this PDF guide</A> to using SPH in
	LAMMPS.
	</P>
	<P>The following coefficients must be defined for each pair of atoms
	types via the <A HREF = "pair_coeff.html">pair_coeff</A> command as in the examples
	above.
	</P>
	<UL><LI>nu artificial viscosity (no units)
	<LI>h kernel function cutoff (distance units)
	</UL>
	<HR>

	<P><B>Mixing, shift, table, tail correction, restart, rRESPA info</B>:
	</P>
	<P>This style does not support mixing. Thus, coefficients for all
	I,J pairs must be specified explicitly.
	</P>
	<P>This style does not support the <A HREF = "pair_modify.html">pair_modify</A>
	shift, table, and tail options.
	</P>
	<P>This style does not write information to <A HREF = "restart.html">binary restart
	files</A>. Thus, you need to re-specify the pair_style and
	pair_coeff commands in an input script that reads a restart file.
	</P>
	<P>This style can only be used via the <I>pair</I> keyword of the <A HREF = "run_style.html">run_style
	respa</A> command. It does not support the <I>inner</I>,
	<I>middle</I>, <I>outer</I> keywords.
	</P>
	<P><B>Restrictions:</B>
	</P>
	<P>As noted above, the Lennard-Jones parameters epsilon and sigma are set
	to unity.
	</P>
	<P>This pair style is part of the USER-SPH package. It is only enabled
	if LAMMPS was built with that package. See the <A HREF = "Section_start.html#start_3">Making
	LAMMPS</A> section for more info.
	</P>
	<P><B>Related commands:</B>
	</P>
	<P><A HREF = "pair_coeff.html">pair_coeff</A>, pair_sph/rhosum
	</P>
	<P><B>Default:</B> none
	</P>
	<HR>

	<A NAME = "Ree"></A>

	<P><B>(Ree)</B> Ree, Journal of Chemical Physics, 73, 5401 (1980).
	</P>
	<A NAME = "Monoghan"></A>

	<P><B>(Monaghan)</B> Monaghan and Gingold, Journal of Computational Physics,
	52, 374-389 (1983).
	</P>
	</HTML>

pair_sph_lj.htmlNo OneTemporaryActions

File Metadata

pair_sph_lj.htmlView Options

Event Timeline

pair_sph_lj.html
No OneTemporary
Actions

pair_sph_lj.html
View Options