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Convergence issues caused by sudden change in storage term, Two phase flow, Coupled HM model
Posted 22.11.2017, 14:48 GMT-5 Structural & Acoustics, General, Porous Media Flow Version 5.3 0 Replies
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Dear all,
I am running a coupled HM model for the two phase flow in poroue media. What I want to achieve a gas breakthrough event which means the gas pressure at the upstream side would reach a peak value before declining to a certain value because of the fracture development. Thus, I have developed a permeability model which increases rapidly once a certain strain. As the storage term in the mass balance equation is a function of the permeability model, this term will also experience a significant change. This equation is shown as
S×rho×dp/dt+div(rho×v)=Qm
where S is the storage term, rho is density, v is Darcy's velocity, Qm is the mass source.
Due to this rapid change in S, the whole model is hard to reach convergence. Could you please give me an idea how to solve such an issue?
Thank you so much for your help.
-------------------Yu Zhang
Hello Yu Zhang
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