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Convergence Issues of coupled HM model of porous media under Constant Volume Condition
Posted Nov 14, 2017, 3:29 p.m. EST Structural & Acoustics, Geomechanics, Porous Media Flow Version 5.2a 0 Replies
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Dear all, Help me!
I am running a coupled HM model for porous media under constnat volume condition, but encounter a series of convergence issures. In my model, I injected a increasing-pressure gas at the injection filter, and the gas is excepted to flow through the specimen and reach the outlet. The increasing gas pressure would reduce the effective stress, and then expansion occurs. However, as all boundaries are set as roller to keep the volume constant, there would be larger compression strain around these boundaries, which will seal the pores for gas flow. This strong coupling would cause a series of convergence issues at these boundaries. I am wondering how i can relieve such strict boundary conditions (Roller), and at the same time, the volume can also keep constant.
Any help would be highly appreciated.
Thank you!
-------------------Yu Zhang
Hello Yu Zhang
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