Are the k-w, Spalart-allmaras, and LES models integrable upto the wall in fluent? I know that the k-epsilon model is not integrable upto the wall in fluent. Where can I get the guidelines for meshing the model if I want to use a model which is integrable upto the wall?

Thank you

If your problem is modelling a low reynolds-number turbulent flow, you must use "Enhanced wall treatment" option in k-e model and "transitional" option in k-w model. Irrespective of either of the strategis, you must put your first grid point near the wall in laminar sublayer, i.e Y+<1.