In my geometry there are 2 volumes like a pipe (1 volume) opening in to a container(2nd volume).After meshing, in the first volume the tip of the pipe by default(when the mesh is exported to fluent) is set as wall(boundary condition), but clearly that shouldnt be a wall.Any suggestions?Thanks. Shankar.

Sure you must specify that boundary as interior manually .

If you don't specify the interface between two fluid volumes, by default gambit used to consider this as an interior. Funny thing is this feature doesn't work in the latest version of Gambit sometimes.

DC

Thanks to both of you.I tried to specify it as "interior" manually, but when exported Fluent says that particular face cannot be specified as "interior".

ha ha this is the latest beauty of gambit !! Try try again and again !! DC

Dear Shankar,

I would suggest you to carefully check the connectivity of the two volumes. When they are not really connected, an unnecessary face is formed, in between.This usually occurs when you split the geometries.

Greetings,

Varghese