For blunt body, the ghost cell boundary condition is easy. But for a geometry with sharp angle, how to implement the ghost cell boundary condition?

To find the ghost point, the normal vector of the wall is needed. But in the region near the sharp angle, how can I find the normal vector for a vertex of a sharp angle??

Hi qu kun I think you can solve this problem by taking the normal vector at cell center for each cell. I hopew this useful

Hi, salem

I'm not very clear about your advice. Could you please contact me by email(my email: quain_tchew@yahoo.com)?

Thanks

Hi qu Kun I mean that why you use vertex normal vector, near singular point you can take normal vector for each cell on both sides of singular point as normal vector at cell center. may i do not understand your question. Regards