grid view in fluent

nirupam

I am solving a natural convection problem in a room using fluent. The hexahedral grid for the room was developed in gambit. When I import the *.msh file in fluent 3d, and view the grid in any cut section, I observe a random curve in any cut section. All along the curve cells have random lines cutting across them. Some times these lines form diagonal and sometimes not. Some of these cells even have more than one line cutting across the cell. This odd behaviour is seen only in cells along a curve. Infact this curve I see is imaginary and appears due to these irregular cells only which are showing extra line through them. All other cells look perfect squares.

This problem is not removed by smoothing the grid. More over such irregular cells are not visible in gambit. Gambit view is as per expectation.

Can Any body give the clue to this behaviour of fluent.

My other colleagues have also reported this feature.

Thanks in advance.

nirupam