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首页> 外文期刊>Journal of Heat Transfer >Laminar Fluid Flow and Heat Transfer in a Lid-Driven Cavity Due to a Thin Fin
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Laminar Fluid Flow and Heat Transfer in a Lid-Driven Cavity Due to a Thin Fin

机译：薄翅片导致的盖驱动腔中的层流和传热

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摘要

A finite-volume-based computational study of steady laminar flow and heat transfer (neglecting natural convection) within a lid-driven square cavity due to a single thin fin is presented. The lid moves from left to right and a fixed thin fin can be positioned perpendicular to any of the three stationary walls. Three fins with lengths equal to 5, 10, and 15 percent of the side, positioned at 15 locations were examined for Re =500, 1000, 2000, and Pr=l (total of 135 cases). Placing a fin on the right wall brings about multi-cell recirculating vortices compared to the case without a fin that exhibits a primary vortex and two small corner cells. A fin slows the flow near the anchoring wall and reduces the temperature gradients, thus degrading heat transfer capacity. A fin positioned near the top right corner of the cavity can reduce heat transfer most effectively in cases with all three different Reynolds numbers and lengths. Regardless of the Reynolds number, placing a fin on the right wall―compared to putting a fin on the left and bottom walls―can always enhance heat transfer on the left wall and at the same time, reduce heat transfer on the bottom, right and top walls. A long fin has the most marked effect on the system's heat transfer capabilities. Mean Nusselt number was successfully correlated to the Reynolds number, length of the fin and its position.
机译：提出了基于有限体积的，由单个薄翅片引起的盖驱动方腔内稳定层流和传热（忽略自然对流）的计算研究。盖子从左向右移动，固定的薄鳍片可以垂直于三个固定壁中的任何一个放置。检查了位于15个位置的长度分别等于侧面的5％，10％和15％的三个鳍的Re = 500、1000、2000和Pr = 1（总共135例）。与没有鳍片的情况相比，在右壁上放置鳍片会产生多室循环涡流，而鳍片上没有初级涡旋和两个小角单元。散热片减慢了锚壁附近的流动并降低了温度梯度，从而降低了传热能力。在所有三种不同雷诺数和长度的情况下，位于空腔右上角附近的散热片可以最有效地减少热量传递。无论雷诺数多大，在右侧壁上放置散热片（与在左侧壁和底部壁上放置散热片相比）始终可以增强左侧壁上的热传递，同时减少底部，右侧和底部的热传递。顶墙。长鳍片对系统的传热能力影响最大。平均努塞尔数已成功地与雷诺数，鳍的长度及其位置相关。

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