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fix sph/density/continuity command

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