Affiliation:
1. Rockwell International Science Center, Thousand Oaks, CA 91360
Abstract
A near-wall model for separated turbulent flows is presented and evaluated. The model is based on experimental observations, in particular, the wake-like behavior of turbulence away from walls, the influence of walls on this behavior, the diffusion/dissipation energy balance observed in the backflow portion of detached flow regions, and the near-wall behavior of eddy-viscosity. These lead to two analytically solvable ODE’s for the normal-to-wall behavior of turbulence kinetic energy and eddy-viscosity. The model is applied in conjunction with an outer eddy-viscosity model (such as a k–ε model) to predict eddy-viscosity distribution in separated flow regions. Predictions of two flow cases, using this approach, are shown.