How works Gas Sand Forces

[sliver]

Hi guys
 
Does anyone know how the GasSandForces DOP works with a flipsolver to convert each particles as grains ?
I haven't read any solution on forums.
 

The Gas Sand Forces DOP computes the local strain and pressure at each point in the fluid. The fluid is then broken into a series of rigid components whose strain is insufficient to separate the grains of sand. These components velocities are projected to be rigid.

 
http://www.sidefx.com/docs/houdini13.0/nodes/dop/gassandforces
 
I'm not sure about what I have write there, is it correct ? :

Velocity Field :     vel
Surface :             surface
Pressure :           pressure
Strain :                strain

 

To complete, it seems that the Gas Sand Forces need a pressure field and the Gas Project Non Divergent could be used in this case to compute pressure. (but I'm stuck about this 2 nodes)

 

Thank you in advance if you can help me.
 
My file if you want to explore it.

GasSandForces_RnD_001.hip

Edited March 6, 2014 by sliver

[Skybar]

I don't think it works for FLIP, but rather the old Sand Solver, maybe SPH too.

[sliver]

Hi Skybar, may be, I hope not, it's not define in the help. I think to work correctly I need to use the Gas Project Non Divergent  to compute the pressure in the Gas Sand Forces but I don't know how these microsolver works.

[sliver]

Hi Skybar, it works with Flip but not very useful, the result don't looks like real sand. I will try an other way