The turbulent flow structure over a repeated-rib geometry rough-walled surface was investigated in connection with a two dimensional square rib roughness which was set on the internal surface of a rectangular channel. The upper plate with ribs of the same pitch can be shifted to arbitrary positions. Reynolds number of duct flow was set to 2.0×104, which was similar to the condition of practical heat exchangers. Flow measurements were performed using a compact fiber laser Doppler velocimeter (LDV) probe. The results of the detailed flow measurements indicated that a recirculating flow existed behind the rib on symmetric and staggered rib geometries. A remarkable large peak value of Reynolds shear stress was observed behind the rib on the staggered rib geometry.
|ジャーナル||American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD|
|出版ステータス||Published - 1989|
|イベント||Heat Transfer in Convective Flows - Philadelphia, PA, USA|
継続期間: 1989 8 6 → 1989 8 9
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