DYNAMIC SMAGORINSKY-MODEL ON ANISOTROPIC GRIDS

To examine the performance of the dynamic Smagorinsky model in a contr olled fashion on anisotropic grids, simulations of forced isotropic tu rbulence are performed using highly anisotropic discretizations. The r esulting model coefficients are compared with an earlier prediction. T wo extreme cases are considered: pancake-like grids, for which two dir ections are poorly resolved compared to the third, and pencil-like gri ds, where one direction is poorly resolved when compared to the other two. (C) 1997 American Institute of Physics.