[ehooi]

Hello,

I am trying to model the flow into porous media. Basically I have a tube where fluid is flowing into a porous media. I am trying to avoid having to model the flow inside the tube. What would be the best way to describe the BC at the interface between the tube and the porous media?

Assuming that I can model the flow inside the porous media with the Darcy law, can I use:

dp/dn = -Q/(K*A)

where Q is the flow rate, K is the hydraulic conductivity and A is the surface area of the tube?

Thanks.
Best wishes,
EH

[FMDenaro]

Originally Posted by ehooi

Hello,

I am trying to model the flow into porous media. Basically I have a tube where fluid is flowing into a porous media. I am trying to avoid having to model the flow inside the tube. What would be the best way to describe the BC at the interface between the tube and the porous media?

Assuming that I can model the flow inside the porous media with the Darcy law, can I use:

dp/dn = -Q/(K*A)

where Q is the flow rate, K is the hydraulic conductivity and A is the surface area of the tube?

Thanks.
Best wishes,
EH

if you consider the normal pressure gradient, in a BL approximation (but for non-permeable wall) it is of order (1/Re). Otherwise you should consider the normal velocity component along the wall....
Actually, I am not sure at all you can do without considering the flow motion.