1 "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
3 :link(lws,http://lammps.sandia.gov)
5 :link(lc,Section_commands.html#comm)
9 pair_style sph/lj command :h3
13 pair_style sph/lj :pre
18 pair_coeff * * 1.0 2.4 :pre
22 The sph/lj style computes pressure forces between particles according
23 to the Lennard-Jones equation of state, which is computed according to
24 Ree's 1980 polynomial fit "(Ree)"_#Ree. The Lennard-Jones parameters
25 epsilon and sigma are set to unity. This pair style also computes
26 Monaghan's artificial viscosity to prevent particles from
27 interpentrating "(Monaghan)"_#Monoghan.
29 See "this PDF guide"_USER/sph/SPH_LAMMPS_userguide.pdf to using SPH in
32 The following coefficients must be defined for each pair of atoms
33 types via the "pair_coeff"_pair_coeff.html command as in the examples
36 nu artificial viscosity (no units)
37 h kernel function cutoff (distance units) :ul
41 [Mixing, shift, table, tail correction, restart, rRESPA info]:
43 This style does not support mixing. Thus, coefficients for all
44 I,J pairs must be specified explicitly.
46 This style does not support the "pair_modify"_pair_modify.html
47 shift, table, and tail options.
49 This style does not write information to "binary restart
50 files"_restart.html. Thus, you need to re-specify the pair_style and
51 pair_coeff commands in an input script that reads a restart file.
53 This style can only be used via the {pair} keyword of the "run_style
54 respa"_run_style.html command. It does not support the {inner},
55 {middle}, {outer} keywords.
59 As noted above, the Lennard-Jones parameters epsilon and sigma are set
62 This pair style is part of the USER-SPH package. It is only enabled
63 if LAMMPS was built with that package. See the "Making
64 LAMMPS"_Section_start.html#start_3 section for more info.
68 "pair_coeff"_pair_coeff.html, pair_sph/rhosum
75 [(Ree)] Ree, Journal of Chemical Physics, 73, 5401 (1980).
78 [(Monaghan)] Monaghan and Gingold, Journal of Computational Physics,