Numerical study of two regularization models for simulating the turbulent flows
Journal
Computers and Fluids
Journal Volume
74
Pages
13-31
Date Issued
2013
Author(s)
Abstract
In this study two previously proposed regularization models employed for simulating turbulent fluid flows in large-eddy template are numerically assessed. Both of the Leray-. α and NS-. α subgrid scale models are under current investigation. For an accurate assessment of these differential models developed on the basis of regularizing the nonlinear convective terms, a dispersively very accurate upwinding scheme is proposed to approximate the regularized convective terms in non-staggered grids. These models are assessed through the calculation of the lid-driven cavity and backward facing step problems. We conclude from this study that application of the NS-. α model can get a solution having a better agreement with the classical Navier-Stokes solution which is computed in a four-time finer grids. © 2012 Elsevier Ltd.
Type
journal article