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flow uniformity after porous region

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Old   February 26, 2020, 09:17
Default flow uniformity after porous region
Yogesh Nalam
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Hello All,

I wanted to know if a non uniform flow (at inlet of porous region) comes out of a porous region uniformly (at outlet of porous region) always ?

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Old   February 26, 2020, 12:26
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Always? No.

It can, but it may or may not make physical sense.

Can you elaborate on why you are asking this question?
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Old   February 26, 2020, 12:32
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Lucky Tran
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Linear isotropic homogeneous porous media certainly has a tendency to. The pressure drop through porous media is generally Darcy-like, where the resistance is proportional to the square of velocity (and not linearly proportional to velocity). Whenever you have anything like this, a strong resistance to the fastest regions of the flow, there is a tendency to make the flow more uniform.

But remember LIH and Darcy-equation, etc. are just models. If you have some exotic metamaterial or heck, even dirt, there might be some consequences not covered by these models.
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porous, porous region, uniformity

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