Syntax:
fix ID group-ID sph/density/continuity
Examples:
fix density all sph/density/continuity
LIGGGHTS vs. LAMMPS Info:
This command is not available in LAMMPS.
Description:
Based on the continuity equation in the form
this fix calculates the density of each particle by the rule
where the summation is over all particles b other than particle a, m is the mass, v is the velocity, Wab is the interpolating kernel (see pair_style sph) and ∇a is the gradient of Wab.
Restart, fix_modify, output, run start/stop, minimize info:
No information about this fix is written to binary restart files.
None of the fix_modify options are relevant to this fix.
No global scalar or vector or per-atom quantities are stored by this fix for access by various output commands.
No parameter of this fix can be used with the start/stop keywords of the run command.
This fix is not invoked during energy minimization.
Restrictions:
There can be only one fix sph/density.
Related commands:
pair_style sph, fix sph/pressure, fix sph/density/corr
Default: none