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Kumar May 3, 2005 09:39

Flow Through Porous media
 
Dear CFX users,

I am trying to simulate 2-D axis-symmetric flow (TWO-PHASE) through a 8mm thick perforated plate (model as a porous media) using CFX4.4. The volume porosity is 0.25. The plate has 360 holes (250mm diameter). I would like to know how to calculate the following terms for CFX 4.4 command file.

BODY FORCE, RESISTANCE CONSTANT and RESISTANCE SPEED FACTOR

Thanks for help Regards, Kumar

Bak_Flow May 4, 2005 07:14

Re: Flow Through Porous media
 
Hi,

there are correlations and experimental results available. You could use a modified Ergun equation (which is for packed spheres given a specified porosity) or find something more appropriate in a reference such as:

Handbook of Hydraulic Resistance, Third Edition by Idelchik

regards,

Bak_Flow

Kumar May 4, 2005 08:04

Re: Flow Through Porous media
 

Kumar May 4, 2005 08:05

Re: Flow Through Porous media
 
Thank Bak_Flow I got the flow resistance for the plate K= 20(non dimensional) from Miller book, but I want the value for RESISTANCE CONSTANT (kg/m^3) and RESISTANCE SPEED FACTOR( kg/m^4).

Regards, Kumar


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