Turn on wall functions
I am working with K-w SST turbulence model. Till now I have been resolving the boundary layer using y+ below 1. However now I want to use wall functions to speed up the process. Once I coarse the mesh, how can I activate wall functions?
Additionally, is it okey y+ around 30? What if in some regions it becomes smaller than 30 so it gets in the buffer region? Is the model able to handle that somehow?
Many thanks in advance.