hi all,

i need to create a thin membrane inside a volume and give the porous jump condition. but whenever i create a face inside a volume and specify the porous jump boundary condition and export it to fluent, the face disappears and everything is taken as interior. how can create and specify a face in the interior and specify it as porous jump? thank you very much in advance

Porous jump in fluent is a particular condition applied to a interior face of fluid. If you have problems importing your model from gambit, try to assign a different condition to your porous face in mesh, than, after importing in fluent, try to apply your porous contition in \boundary contition menu. I hope it's helpful. regards.

Adriano

thank you Adriano, i did try this quite a few times for other boundaries. but for this porous jump problem, the face needs to be double sided interior as per the manual. even if i change it to any other type of boundary condition, any face inside the fluid zone is not recognised by fluent except as an interior.

In this case it's maybe necessary to use a UDF such DEFINE_PROFILE or samething similar. U must apply your condition only on face side interessed with a face loop or similar. Adriano

[moun139]

I woul like to set velocity and concentration in both sides of a thin membrane in fluent ,but i cant ,because the porous jump panel had not place where we can put theses condition , is it a sujestion ?