New question #253562 on Yade:
https://answers.launchpad.net/yade/+question/253562
Hi,
I want to get the pore pressure of a saturated soil sample in an undrained
triaxial test when the sample volume is decreasing.
...
TriaxialStressController(thickness=0,stressMask=7,internalCompaction=False,label='triax')
...
triax.goal1 = 35000
triax.goal2 = 35000
triax.goal3 = 70000
triax.wall_back_activated = False
...
flow.viscosity = 1.3e-3
flow.fluidBulkModulus = 2e9
flow.bndCondValue=[0,0,0,0,0,0]
flow.bndCondIsPressure=[0,0,0,0,0,0]
...
For one of my simulations a decrease of ca. 1,8 % in porosity (=-dV/V) is
obtained. When I calculate corresponding pressure increase I get
dp = K*(-dV/V) = 2e9*0.018 = 36000000 Pa
But the output from PFV shows maximum average pressures around of 16 Pa (not
MPa!). As long as I use SI units the output of flow.averagePressure() should be
Pa, right?
So is there a problem in the code or did I miss something in the
compressibility option of PFV?
regards,
christian
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