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Enhancement of forced convection heat transfer in a three-dimensional laminar channel flow with insertion of a moving block

机译:插入移动块可增强三维层流中强制对流换热

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摘要

Enhancement of heat transfer rate of a heat surface in a three-dimensional channel flow with insertion of a moving slender block is investigated numerically. A slender block is installed along the direction of the channel flow, and the movement of the slender block is in periodic motion and transverse to the channel flow. Due to the interaction between the channel flow and slender block moving, a large circulation vertical to the channel flow is induced and follows the moving slender block closely. The behaviors of the slender block and circulation destroy and suppress the velocity and thermal boundary layers on the heat surface periodically. These phenomena first observed cause the heat transfer rate of the heat surface to be enhanced especially in the downstream of the heat surface. The maximum magnitude of enhancement in this study is about 50%.
机译:数值研究了随着移动细长块的插入,三维通道流中的热表面传热速率的提高。细长块沿通道流的方向安装,细长块的运动呈周期性运动并垂直于通道流。由于通道流与细长块移动之间的相互作用,导致垂直于通道流的大循环并紧随移动的细长块。细长块和循环的行为周期性地破坏和抑制热表面上的速度和热边界层。首先观察到的这些现象导致热表面的传热速率提高,尤其是在热表面的下游。这项研究的最大增强幅度约为50%。

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