NUMERICAL PREDICTION OF AIR FLOW THROUGH PERFORATED PLATES ON FLAT SURFACE

摘要

A turbulent two dimensional flow behind perforated plate is numerically simulated and compared with the results of wind tunnel experiments from literature 1. Realizable k-epsilon; of the Fluent software is tested for the normal plates of porosities 0, 10, 20, 30, 40 and 50, using which mean velocity, surface mean pressure and reattachment lengths were predicted inorder to study the fluid interaction and the size and shape of the bubble. Realizable k-epsilon; turbulent model, which is an eddy-viscosity turbulence model, performed reasonably well for the thin perforated plate under study. For perforation greater than 30, the simulation showed that the bubble is completely swept out as proved by the experiment.