Wall y ⁺ approach for dealing with turbulent flows over a wall mounted cube

An approach to dealing with turbulent flows over a wall mounted cube using the wall y ⁺ (non-dimensional distance from the wall) as guidance in selecting the appropriate grid configuration and corresponding turbulence models is investigated using FLUENT 6.3. The study is divided into two sections - Case I and Case II, dealing with low and high Reynolds numbers, respectively. Five turbulence models - the standard k-ε, standard k-ω, Reynolds Stress Model (RSM), Spalart-Allmaras (SA) and renormalisation group (RNG) k-ε are used to solve the closure problem. Their behaviours, together with the accompanying near-wall treatments, are investigated for wall y ⁺ covering the viscous sub-layer, the buffer layer and the log-law region'.