0228 多孔体面上のはく離・再付着乱流のPIV計測(OS2-6 乱流の計測・解析・制御,オーガナイズドセッション)

概要

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To understand the flow physics of separating and reattaching flows over porous walls, PIV measurements are carried out for turbulent rib-mounted permeable channel flows. Two kinds of square cylinder ribs: impermeable (solid) and permeable (porous) ribs, are considered. It is found that in the case of the porous rib, the recirculation behind the rib shifts downstream due to the flow going through the porous rib. From the measured turbulence quantities, the flow downstream the porous rib is confirmed to be far less turbulent than that behind the solid rib. By comparison with the solid channel flow LES, the turbulent intensity and the shear stress are found to be lower than those of the LES due to the bypass flow through the porous bottom wall.
一般社団法人日本機械学会の論文
2009-11-06