Syntax:
fix ID group-ID sph/density/corr style args
shepard args = every nSteps
nSteps = determes number of timesteps
Examples:
fix corr all sph/density/corr shepard every 30
Description:
In general the pressure field in SPH exhibits large oscillations. One approach to overcome this problem is to perform a filter over the density.
The filterstyle shepard is one of the most simple and quick correction. Every nSteps timesteps the following rule is applied:
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: none
Related commands:
pair_style sph/artVisc/tensCorr, fix sph/pressure, fix sph/density/continuity
Default: none
(Liu and Liu, 2003) "Smoothed Particle Hydrodynamics: A Meshfree Particle Method", G. R. Liu and M. B. Liu, World Scientific, p. 449 (2003).