Partially Averaged Navier-Stokes: A (k-ω)/(k-ε) Bridging Model

摘要

A new Partially Averaged Navier-Stokes (PANS) bridging model is derived from existing (k?ω) and (k?ε) PANS formulations. The model behaves like the PANS (k?ω) model near rigid walls and like the PANS (k?ε) model away from walls. The new model is tested using well-known benchmark problems; a backward-facing step representing wall-bounded flows, and a circular cylinder representing free shear flows. Our results are compared to existing experimental data and previous simulation results using PANS (k?ω) and PANS (k?ε). The comparisons show our model to be superior at predicting velocity profiles in both flows. In addition, Reynolds stress predictions are also shown to improve.