Surface Roughness Benefits in Open Cavity Flows

Surface Roughness Effects on Cavity Flows

“…This had an effect in reducing the sound intensity levels. Ganesh et al [20] investigated the effect of hemispherical surface roughness elements on cavity flows. It has been observed that, for a given Reynolds number, the presence of roughness elements promoted earlier transition of the shear layer, thus reducing the maximum sound pressure level by ≈ 7dB.…”

“…We report the results from a series of high-fidelity eddy resolving simulations on a rectangular cavity with a high aspect ratio, L/D = 3. In contrast to our earlier study [20], we report the results on two different roughness distributions (sparse/densely packed elements) at two different Reynolds numbers and draw comparisons against the smooth cavity case. The effect of surface roughness distribution on the Rossiter modes, shear layer and centrifugal instabilities in cavities are also brought out.…”