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[Question #707197]: Undrained triaxial (NOT CONSTATNT VOLUME)


New question #707197 on Yade:

Please help! 
I have been struggled with flow engine since March and I experience depression or something. 
I set up the triaxial undrained simulation and faced some difficulties.
First thing, pore pressure responce is wierd. I could not get the increase of pore pressure up to max value. I change viscosity, time step, everyting , compressibility of fluid (diffrent bulk modules). The pore pressure responce is 1e-10 or something and goes to negative value. Please give me some suggestions how to approach a adequete results (which is corresponding to soil mechanics theory). 

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