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Porous Media model and mesh size

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Old   September 17, 2015, 10:13
Default Porous Media model and mesh size
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Francisco Bailly
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Porous media model can be used in order to avoid to describe explicitly complex geometries (packing,..) which would require really cell consuming mesh discretization.

I get that pressure drop will be calculated from empirically formulation (Ergun) allowing to reproduce the flow resistance that the explicit geometry would provide.

But I can't find any recommendation regarding the size of the mesh inside the porous zone. How coarser can it be ? Is it an important matter as blockage is not physically represented inside the porous zone and a superficial velocity is by default introduced.. What about turbulence phenomena ?

Thanks to enlighten me on this topic
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Old   September 18, 2015, 01:52
Devesh Baghel
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Is there any heat transfer/reaction modelling involve in porous zone while calculation ?
If it is a simple case of flow problem with porous media, keep the uniform cell size as entrance/exit of porous zone. It will control the jump in momentm calculation and will be ease as we provide higher resistance to rest of the direction of flow.

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