[MrCFD]

I have been trying to extrude an unstructured tertahedral grid off a wing using Gridgen. I am using the COBALT package to run simulations on the resultant grids.

However, COBALT pre-processing (Blacksmith) keeps returning errors that the grid contains folded faces. I was wondering if there are any tools in Gridgen that I could use to check for and/or stop the creation of folded faces during the extrusion.

Additionally, any tips on how to build more robust grids that can capture boundary layer flows over complex objects (emphasis on using Gridgen) would be much appreciated. I have been having other issues extruding blocks from surface domains. Specifically, one of the problems that I have been having is that the block tends to split at corners or edges where the surface domains connect. This creates crevices in the block itself that are impossible to 'fill.' Also I was looking for a better method of estimating initial spacing of the extrusion to maintain low Y+ values.

Thanks.