Kalyan Goparaju
Ansys Employee

Hello, 


Resolution of boundary layer is extremely critical to getting accurate results, especially in high speed compressible flows. In this flow regime, it is generally recommended to not use wall functions, but instead have fine enough resolution to integrate through the viscous sub-layer. The minimum recommended resolution is y+<1 and 10-15 points within the BL. However, it doesn't hurt to pack in more cells to capture the gradients with high fidelity. 


Please mark the appropriate answer as 'Is Solution' so that it can help others. 


Thanks,


Kalyan