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fix sph/density/summation command

Syntax:

fix ID group-ID sph/density/summation 

Examples:

fix density all sph/density/summation

LIGGGHTS vs. LAMMPS Info:

This command is not available in LAMMPS.

Description:

Calculates the density field with the classic SPH-summation approach. The governing equation is given by:

ρa is the density of particle a, m is the mass and Wab denotes the interpolating kernel (defined in the pair_style sph) for the particle-particle distance ra - rb. The summation is over all particles other than particle a.

NOTE: In the current version boundary or image particles are not implemented. Therefore, the density calculation in the vicinity to a wall will be wrong.

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/... (except fix sph/density/corr)

Related commands:

pair_style sph, fix sph/pressure, fix sph/density/continuity

Default: none