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[Bruno Chareyre <question703284@xxxxxxxxxxxxxxxxxxxxx>]

Question #703284 on Yade changed:
https://answers.launchpad.net/yade/+question/703284

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi,

Q1." flow.gradP？or flow.imposePressure() ?" both work and they are
compatible with each other. Typically, you can assign P somewhere and
its derivative at the macroscale (the gradient).

Q2. "flow.averageVelocity() achieve it or not.". Yes. The average
velocity is the output if you assign gradP as input.

Q3. "if the PeriTriaxController and PeriodicFlowEngine can reproduce the oedometer test" 
Easy answer: "no". The oedometer is a diffusion problem and a diffusion problem is not periodic in general.
Tedious answer: in fact you could impose fluid pressure along a plane cutting through the period, and impose the average effective stress with PeriTriax (how exactly, I'm not sure). That would somehow approach an oedometer situation, and it would be consistent with the general theory of consolidation. But in fact it would only make things more complex, and in the end you would just simulate the periodic superposition of independent consolidating layers. I don't see a clear progress.

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