DOI: 10.1615/TSFP2
ASSESSMENT OF THE NEWLY DEVELOPED SUBGRID-SCALE EDDY VISCOSITY FOR THE DYNAMIC PROCEDURE USING FDM ON CHANNEL FLOW AND RAYLEIGH-BENARD CONVECTION
ABSTRAKT
The newly developed Subgrid-scale(SGS) eddy viscosity representation (Tsubokura, 2001) for the dynamic SGS model (Germano et al., 1991) using finite difference method (FDM) was further studied and the related SGS flux model was proposed to apply the method to a flow with passive scalar transport and a buoyancy-driven flow. Our main concern here is to see the dependence of the proposed models' results on the discretized filtering operation. The proposed models were tested in the plane channel flow with passive scalar transport and the Rayleigh-Benard convection. Proposed models were found to predict better statistics than the dynamic Smagorinsky's and contrarily to the Smagorinsky's, showed insensitivity to the explicit test filtering operation in both flows