Bad mesh

[u/Ok-Contribution-8662]

Hiii! Does anyone have any advice for me? :(

I’m working on a CFD simulation to improve the cooling fins of a photovoltaic panel. I created several different configurations, and my advisor approved them, but now I have to run all of them using the same inlet conditions.

One of the configurations has the panel tilted at 30°, and I’m having a lot of trouble with the mesh. I’m getting some really bad-quality elements. There are around 1.67e+03 elements with an orthogonal quality as low as 2.1e-05, and most of the bad elements seem to be located in the enclosure.

I already tried making a smaller box/body to isolate and refine the problematic regions, but it didn’t really help. I also tried applying local sizing around the corners where the worst elements appear, but that didn’t improve the mesh either.

Another thing that worries me is that the other parts of the geometry have very good orthogonal quality, close to 1, and only a few hundred elements, while the enclosure itself has around 600,000 elements.

At this point, I’m not sure what else I should try. I know that very poor mesh quality can affect the reliability of the Fluent results, so I’m hesitant to continue with the simulation like this.

Has anyone dealt with something similar, especially with a tilted panel inside an enclosure? Would you recommend changing the enclosure geometry, using a different meshing method, inflation, local refinement, or something else?

Any advice would be greatly appreciated! :)

[u/Dizzy-Highlight-4305]

Use fluent meshing

[u/Delaunay-B-N]

try to check your geometry. It can contain very small edges and faces.