平行平板流路内の単一突起が,対向面の伝熱流動に及ぼす影響について : ポーラス形突起とソリッド形突起

A numerical study is presented for the laminar flow and the heat transfer on the smooth heated surface opposite a single porous-type roughness element on the insulated wall in a parallel plate duct. The calculation was performed for the dimensionless height of an element H=0.357-0.642, the Reynolds number Re=100-1500 and the Darcy number Da=0.000025-0.025. The recirculation flow was generated behind the porous-type roughness element for low Da numbers and aided the increase of local heat transfer. The characteristics were compared with the numerical results for an abrupt contraction and expansion flow due to a single solid-type roughness element in a flow passage.