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Old   June 15, 2012, 04:06
Default openfoam unstaedy condition
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i am working in openfoam, and my case is to simulate flow in a catalytic convertor. i have chosen my solver as porousSimpleFoam. but i found that this solver deals with steady condition. how can i change this to solve for unsteady condition or which file i must alter inorder to make it to solve unsteady conditions.
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Old   June 20, 2012, 02:49
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why no reply, where are the cfd experts
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Old   June 20, 2012, 03:15
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I have never worked with the porous media solvers but here is what I would suggest:

Since there is no porousPimpleFoam you either have to modify the solver porousSimpleFoam yourself, meaning adding the parts that are missing for a transient simulation. Those are usually the time derivatives. Then recompile and run. If you want to follow this route, I would say compare simpleFoam and pimpleFoam and see what is different. porousSimpleFoam is a derivative of the simpleFoam solver.

The other option that I see is to use on of the other porous solvers, if applicable, . If they are not applicable, see if you can combine the knowledge that you can gain from these solvers (which are transient) and implement this into a porousPimpleFoam.

As said earlier, I have not used any of these solvers myself and can't say too much about applicability and/or ease of implementation of the transient part.
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