A DDES Model with Subgrid-scale Eddy Viscosity for Turbulent Flow

A dynamic global-coefficient subgrid-scale eddy-viscosity model for large-eddy simulation in complex geometries

A Variational Multiscale Method with Multifractal Subgrid-scale Modeling for Large-eddy Simulation of Turbulent Flow

A variational multiscale method with multifractal subgrid-scale modeling is proposed for large-eddy simulation of turbulent flow. In the multifractal subgrid-scale modeling approach, the subgrid-scale velocity is evaluated from a multifractal description of the subgrid-scale vorticity, which is based on the multifractal scale similarity of gradient fields in turbulent flow. The multifractal sub...

Numerical Analysis of a Subgrid Scale Eddy Viscosity Method for Higher Reynolds Number Flow Problems

We develop a variationally consistent eddy viscosity model, given by [18] for convection diffusion equation, for the Navier-Stokes equations. We also prove that the new model is equivalent to a variational multiscale method. The new method removes the restriction that the fluctuations are quasi-stationary. We then give a complete error analysis. The error analysis is optimal and uniform in Reyn...

A ‘Synthetic Scalar’ Subgrid-Scale Model for Large-Eddy Simulation of Turbulent Combustion

In this paper we present an alternative formalism for large-eddy simulation that avoids the problems arising from filtering the governing equations. In particular, we instead propose to filter solutions leading to the ability to directly model subgrid-scale primitive variables; i.e., model physics rather than statistics. We then demonstrate construction of subgrid-scale models of scalar quantit...

A new subgrid eddy-viscosity model for large-eddy simulation of anisotropic turbulence

A new subgrid eddy-viscosity model is proposed in this paper. Full details of the derivation of the model are given with the assumption of homogeneous turbulence. The formulation of the model is based on the dynamic equation of the structure function of resolved scale turbulence. By means of the local volume average, the effect of the anisotropy is taken into account in the generalized Kolmogor...