lammps/doc/pair_sph_taitwater_morris.txt

"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)

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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:

\begin{equation}
p = B [(\frac{\rho}{\rho_0})^{\gamma} - 1],
\end{equation}

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

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[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

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:link(Morris)
[(Morris)] Morris, Fox, Zhu, J Comp Physics, 136, 214–226 (1997).