# Equivalent porous jump condition

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 September 12, 2012, 15:48 Equivalent porous jump condition #1 New Member   Join Date: Dec 2010 Posts: 16 Rep Power: 7 Hello Everybody, I have two porous surfaces - one on top of another with a certain small distance between them. One of them is horizontal with a certain porosity while another is inclined with another porosity. I would like to use a single porous jump condition for modeling both surfaces with no gap between them. I was wondering if there was any way of combining the two porous surfaces into an equivaluent surface. For modeling in FLUENT this becomes a two part question, I believe: 1. How can the equivalency with respest to geometry be established? and 2. How can the pressure drop vs. velocity correlation be combined? I hope I have been clear with my intended calculations but please let me know if further clarifications are needed. I think that there should be a method of doing this, as I think that this is an oft encountered problem. Thanks in advance for your suggestions.

September 13, 2012, 07:16
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Join Date: Jun 2011
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Rep Power: 7
Quote:
 Originally Posted by svp Hello Everybody, I have two porous surfaces - one on top of another with a certain small distance between them. One of them is horizontal with a certain porosity while another is inclined with another porosity. I would like to use a single porous jump condition for modeling both surfaces with no gap between them. I was wondering if there was any way of combining the two porous surfaces into an equivaluent surface. For modeling in FLUENT this becomes a two part question, I believe: 1. How can the equivalency with respest to geometry be established? and 2. How can the pressure drop vs. velocity correlation be combined? I hope I have been clear with my intended calculations but please let me know if further clarifications are needed. I think that there should be a method of doing this, as I think that this is an oft encountered problem. Thanks in advance for your suggestions.
See below for simulations involving porous medium:

http://www.eureka.im/756.html
http://www.eureka.im/869.html

 September 13, 2012, 13:51 Re: #3 New Member   Join Date: Dec 2010 Posts: 16 Rep Power: 7 Hi mali28, Thanks for your reply and the links. While these links are useful, my question is more about using a single equivalent porous jump condition to simulate two porous surfaces separated by a small distance. In other words, how can we model the geometry and pressure drop correlation, if we have two porous surfaces stacked on each other, with a single porous jump condition in FLUENT?

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