Hi everyone, I'm using Phase Field model to simulate two phase flow in pore scale. When the model is bounded by no slip or wetted wall, everything comes out good. However, when I apply Periodic BC on two of the boundaries. The amount (volume fraction) will decrease to 0 which means one of the fluid will vanish as the simulation going on. Could someone give me some advice about this issue. Thank you very much. The model is quite large so I cant upload it. But I can send it through email to you.
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