[lbj007]

Hi, I'm meshing for a 10-cell fuel cell stack, first I generate face mesh using blocks,then I can get the mesh in the middle by extruding mesh to form the 1-cell mesh and translating and coping mesh，and I need to get the mass flow of each stack.,so I create some iso-surfaces parallel to outlet,but I find there are some elements missing on the face and I'm confused. This will lead to inaccurate mass flow calculation.Does anyone know how it works?

[lbj007]

solved,I think it's some of Fluent's bug,I tried today and it no longer occurs

[Gert-Jan]

I don't know if this helps, but when I see something like this in ICEM, mostly the problems are related to the normal of surface elements not being consistent. You can change this in the edit Mesh Menu > Reorient Mesh > Reorient consistent.
Just select one of the elements as a reference. It does not matter which one. In the end, at least all elements for each boundary have the same normal and are in one group in Fluent.

[lbj007]

Originally Posted by Gert-Jan

I don't know if this helps, but when I see something like this in ICEM, mostly the problems are related to the normal of surface elements not being consistent. You can change this in the edit Mesh Menu > Reorient Mesh > Reorient consistent.
Just select one of the elements as a reference. It does not matter which one. In the end, at least all elements for each boundary have the same normal and are in one group in Fluent.

Thanks first, you give me a helpful 'trick',but my model doesn't need to consider about it,I just use blocks to generate 1-cell's mesh and copy-translate it 9 times.
still thanks for giving a idea.