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modelling a porous wall as outlet

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Old   October 27, 2006, 09:03
Default modelling a porous wall as outlet
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Swen
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Hello,

I want to modell a filter to seperate particels.

Can I use a porous wall as outlet boundary to seperate injected particel?

And how I define a the porous wall as boundary condition?

Thanks for your help Swen
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Old   October 27, 2006, 10:34
Default Re: modelling a porous wall as outlet
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Ralf Schmidt
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Hi!

I dont know about particles, I think, there is a udf needed...

You can define your porous wall as a "porous jump". It is like a internal edge, but with the properties of a porous medium.

The parameters of the porous jump can be derived from the geometry of the filter.

It is not possible, to use the porous jump as outlet. I would modell a region beyond that outlet (if you have a pipe, model additional 2*d, if it is the exit from a container, modell the surrounding to a certain extent) and than set a pressure outlet condition.

Hope, it helps

Ralf
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Old   November 1, 2006, 09:12
Default Re: modelling a porous wall as outlet
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Swen
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Thank you very much, i modeled the porous jump and added some volumen after this and it works ...

Swen
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Old   July 10, 2011, 07:42
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zohreh
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hi
I want to model a filter in order to separate particles!! did you use porous jump with particles? did this boundary condition capture particles and do separation in good way??

you answer is very important for me
thanks a lot
regards
zohreh
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