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Equivalent porous jump condition

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Old   September 12, 2012, 15:48
Default Equivalent porous jump condition
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svp
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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.
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Old   September 13, 2012, 07:16
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Quote:
Originally Posted by svp View Post
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
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Old   September 13, 2012, 13:51
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svp
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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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