Jeffrey R. Koseff

A dynamic mixed subgrid‐scale model and its application to turbulent recirculating flows

The dynamic subgrid‐scale eddy viscosity model of Germano et al. [Phys. Fluids A 3, 1760 (1991)] (DSM) is modified by employing the mixed model of Bardina et al. [Ph.D dissertation, Stanford University (1983)] as the base model. The new dynamic mixed model explicitly calculates the modified Leonard term and only models the cross term and the SGS Reynolds stress. It retains the favorable features of DSM and, at the same time, does not require that the principal axes of the stress tensor be aligned with those of the strain rate tensor. The model coefficient is computed using local flow variables. The new model is incorporated in a finite‐volume solution method and large‐eddy simulations of flows in a lid‐driven cavity at Reynolds numbers of 3200, 7500, and 10 000 show excellent agreement with the experimental data. Better agreement is achieved by using the new model compared to the DSM. The magnitude of the dynamically computed model coefficient of the new model is significantly smaller than that from DSM.

Parameterization of turbulent fluxes and scales using homogeneous sheared stably stratified turbulence simulations

Laboratory experiments on stably stratified grid turbulence have suggested that turbulent diffusivity

Reynolds number and end-wall effects on a lid-driven cavity flow

\kappa_\rho

Visualization Studies of a Shear Driven Three-Dimensional Recirculating Flow

can be expressed in terms of a turbulence activity parameter

Turbulence in Stratified Shear Flows: Implications for Interpreting Shear-induced Mixing in the Ocean

\epsilon/\nu N^2

A numerical study of the evolution and structure of homogeneous stably stratified sheared turbulence

, with different power-law relations appropriate for different levels of

Combined forced and natural convection heat transfer in a deep lid-driven cavity flow

\epsilon/\nu N^2

Does the Sverdrup critical depth model explain bloom dynamics in estuaries

. To further examine the applicability of these findings to both a wider range of the turbulence intensity parameter

A short-term in situ CO 2 enrichment experiment on Heron Island (GBR)

\epsilon/\nu N^2

The relationship between mean and instantaneous structure in turbulent passive scalar plumes

and different forcing mechanisms, DNS data of homogeneous sheared stratified turbulence generated by Shih et al. (2000) and Venayagamoorthy et al. (2003) are analysed in this study. Both scalar eddy diffusivity