SimScale CAE Forum

Non Orthogonality issue

Hi there,

I have the following project here and wanted to check the quality of the mesh. The Non Orthogonality max value is 76 which is larger than the recommended value in the documentation. (<<75)

Could anyone help me with a method to reduce this value please?


A maximum non orthogonality of 76 is definitely acceptable for current CFD solvers. Have you already tried to run a simulation to see if you run into problems?

Depending on the complexity of your CAD model, reducing the max non orthogonality much further may not be possible, unless you defeature the details too much (which may defeat the purpose of the analysis).


1 Like

Hi there,

I have not yet run a simulation as i thought the 76 was unacceptable. The cad model is very basic (a simple tall building) I will run the simulation and see if there are any problems.

Thank you for the help!

As @RicardoParis mentioned, for incompressible solvers for a single-phase flow, it should not be an issue. Still, if the solution starts to diverge check out this post: Post. Start by adding a non-orthogonal correction.

Happy CFDing,