A velocity estimation model for large eddy simulations of high Reynolds number homogeneous isotropic turbulence

The primary goal of this dissertation is to develop a subgrid scale model for large eddy simulations of high Reynolds number homogeneous isotropic turbulence which attempts to model the velocity field up to twice the cutoff wavenumber and does not require a priori knowledge of the flow characteristics.; There are many subgrid scale models for large eddy simulations of turbulence which produce good results within a limited range of Reynolds numbers; however, as the Reynolds number changes, the constants often require adjustment based upon some a priori knowledge or the model may not be applicable. One of the models which did not require any a priori insight was the velocity estimation model developed by Domaradzki and Saiki (1997). This model also had limitations on the range of applicability in terms of Reynolds number.; This study extends the basic concepts of the original velocity estimation model to moderate and high Reynolds number isotropic turbulence. The results from four test cases show a good match to the theoretical or experimental data upon which they are based.