Porous media pressure drop coefficient
Hi!
How do you calculate the pressure drop coefficient for porous media. I was trying to model tube bank in a recirculation zone as porous media. I tried using standard correlations for friction factor for flow across tube banks, but the results seem physically unrealistic. Prabodh 
Re: Porous media pressure drop coefficient
Take a look to the methodology guide concerning the modeling of porous media. There are also a few examples there on how to calculate the porous media coefficients. Remember also that the coefficients to be calculated (alpha and beta) must give you a pressure drop *per unit length*.

Re: Porous media pressure drop coefficient
I tried calculating the beta value from friction factor for flow across tube banks, based on the average reynolds no. But the results are not very encouraging ( in fact they seem physically unrealistic).

Re: Porous media pressure drop coefficient
Hii Can you send me detail about your problem, I had done a tube bundle analysis using porous media. May be i can suggest you something.

Re: Porous media pressure drop coefficient
Thanks Anil. I was doing a flow model study of 66MW boiler. The area of concern lies just downstream a bend. The flow without any tube bundle has a recirculation zone at the bottom half of the bend. I want to analyze the flow in the real situation when tube bundles are peresent in the recirculation zone. I have got some results from actual field test but these have been taken on a very coarse grid. When I model the tuble bundles as porous media, I get a very skewed flow with maximum at the top tapering very rapidly and then gradually rising at the bottom. Hope this helps. If you want I can mail you the outline of my domain along with come of the results.

Heat Transfer in porous media
Dear anil
I want to analyze the porous media considering the conduction mode by using starcd.actually i have to analyze for metal hydride beds and some annular sections.is it possible to do in starcd.i am new to starcd area.i saw ur mail in starcd forum,u only done on this porous media.please reply me in this regard. thank u. Devender. 
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