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[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

> actually I would like to test the effect of gravity on the porosity. 
> Basically, after the expansion, I would like to apply the gravity 
> (let's say gradually), to the sample. How can I do that using the 
> Triaxial code? I don't need to perform the Triaxial itself, it would 
> be just a test only with the gravity but I want to use the expansion 
> method contained in the Triaxial to generate the sample. Any suggestions?
Quick suggestion :

- Push back the gravity engine with gravity=0

- After the compaction, fix boundaries :
wall_top_activated = wall_bottom_activated = ... = false; //in python 
(recommended) or c++

- set gravity = something

- run


Bruno