Publications / Conference Paper

Gas-kinetic simulations of compressible turbulence over a mean-free-path-scale porous wall

McMullen, Ryan M.; Krygier, Michael K.; Torczynski, J.R.; Gallis, Michail A.

We report flow statistics and visualizations from gas-kinetic simulations using the Direct Simulation Monte Carlo (DSMC) method of compressible turbulent Couette flow over a porous substrate composed of an array of circular cylinders for which the Knudsen number is O(10-1). Comparisons are made with both smooth-wall DSMC simulations and direct numerical simulations of the Navier-Stokes equations for the same conditions. Roughness, permeability, and noncontinuum effects are assessed.