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Convergence of the porous medium model

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Old   January 8, 2008, 23:54
Default Convergence of the porous medium model
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My question is 2-D model, gas flow field. When simulating, firstly, we use first-order upwind scheme, Once the solution approached a stable condition, we switched a second-order upwind scheme. However, the residuals are still high to 0.01. How can we obtain the converged results for the porous medium model? Thanks in advance.
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