I have big box and i want to define energy source box inside the big box .... I think that i must define fluid into the source box inside gambit but when I export the mesh from the gambit and read it to Fluent, gambit have defined walls to the energy source box. How I define those extra boundaries when gas flow through the energy source box???

Thank you!

Marko,

you should be able to change the wall into an interior bc, if the two fluid zones are connected. Otherwise you might try non-conformal interfaces to get one domain of two.

You also can separate fluid zones in fluent by the adapt region method. Have a look to the User's Guide on how to perform.

Sorry!

I have made a mistake Everything is ok! If I define new fluid and export mesh to fluent its ok if fluent define new wall for that fluid. Sorry

marko