New question #250196 on Yade: https://answers.launchpad.net/yade/+question/250196
Hi, For my simulations it is no problem to do a drained triax test with this PFV options: flow.bndCondIsPressure=[0,0,1,0,0,0] flow.bndCondValue=[0,0,0,0,0,0] I also want to do an undrained test, like this: flow.bndCondIsPressure=[0,0,0,0,0,0] flow.bndCondValue=[0,0,0,0,0,0] Then I get this warning: CHOLMOD warning: matrix not positive definite something went wrong in Cholesky factorization, use LDLt as fallback this time To solve this, I have to use at least one fixed pressure boundary condition or impose pressure at one (or more) cells, e.g.: flow.imposePressure(Vector3(triax.width/2,triax.height/2,triax.depth/2),0.001) So the pressure of this cell will be constant during the calculation and in the end it is still a drained test, right? If I do flow.clearImposedPressure() after some steps were done, the same warning (see above) appears again. Is there a trick to simulate an undrained test with FlowEngine? Christian -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
