Gambit help: Cube inside cube

Jack Martinez

Hello!

We intend to create a geometry (cube inside cube) in Gambit. The inner cube has to cut off because we dont want any cell in that region. The outer cube is a 3*3*3 mm^3 and the inner cube is 1*1*1 mm^3 (both have same center).

We have written our own grid file, because we need only 26 cells in the entire volume, and imported it in Gambit. The gambit is able to display the geometry properly but couldn't identify different selections assigned before.

Our requirement is, when we import this 3d mesh-grid from Gambit in Fluent, there should be following two zones in the boundary conditions selection panel:- 1. The inner cube. 2. The volume between the inner cube and outer cube.

Our grid file is correct, I have checked on different platform like Fire and radtherm but when I imported it in Fluent it couldn't identify different zones. This is a problem I am facing since long with Fluent.

So I am trying to make selections in gambit and then export it in Fluent. However the gambit is giving warning like "A default unspecified boundary entity was created" and again Fluent couldn't identify the internal cube selection. In Gambit, I tried to group all the faces of inner cube to have a selection before exporting in Fluent.

An urgent help is required, as we have a deadline very close.

If required I will send my grid file for your reference. Let me know about ur mail id..

With regards Jack Martinez.