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首页> 外文期刊>International Journal of Heat and Mass Transfer >Mixed convection characteristic in a lid-driven cavity containing heated triangular block: Effect of location and size of block
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Mixed convection characteristic in a lid-driven cavity containing heated triangular block: Effect of location and size of block

机译：包含加热的三角形块的盖子驱动腔中的混合对流特性：块的位置和大小的影响

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摘要

The present work examines the influence of location of the heated triangular block along the vertical centerline of cavity on mixed convection characteristics. The flow is assumed to be 2D, steady, laminar and for incompressible and Newtonian. The physical domain of study is top lid-driven square cavity. The top and bottom walls of cavity are thermally insulated; while the both vertical walls are exposed to ambient (T-c). The cavity contains equilateral triangular block (size of edge, b), maintained at isothermal temperature condition (T-H( T-c)) along its geometric horizontal centerline. The change in the position of block is permitted along the vertical centerline (x = 0.5,y) of cavity. Flow pertaining equations are solved by using finite volume method (FVM) and SIMPLE algorithm. The dependence of various relevant dimensionless parameter, such as, Reynolds number (Re = 1-1000), Richardson number (Ri = 0.01, 1, 10), blockage ((B) over bar = 0.1, 0.2, 0.3) and location (L-y = 0.25, 0.5, 0.75) of triangular block on convection characteristics have been elucidated. Flow and thermal patterns in the cavity are analyzed by systematic evaluation of streamline and temperature contours. Followed by heat transfer characteristics are presented by studying variation of local as well as average Nusselt number. Average Nu values are presented in the form of tables for different values of Ri. Higher heat transfer rates can be achieved for centered block position (L-y = 0.5) than remaining two (L-y = 0.25, 0.75). (C) 2018 Elsevier Ltd. All rights reserved.
机译：本文研究了沿腔体垂直中心线加热的三角形块的位置对混合对流特性的影响。假定流动是二维的，稳定的，层流的并且是不可压缩的和牛顿的。研究的物理领域是顶盖驱动的方腔。空腔的顶壁和底壁是绝热的；而两个垂直壁都暴露在环境温度（T-c）下。空腔沿其几何水平中心线包含等边三角形块（边缘的大小，b），保持在等温温度条件下（T-H（> T-c））。沿着空腔的垂直中心线（x = 0.5，y）可以更改块的位置。采用有限体积法（FVM）和SIMPLE算法求解流量相关方程。各种相关的无量纲参数的相关性，例如雷诺数（Re = 1-1000），理查森数（Ri = 0.01、1、10），阻塞（（B）超过bar = 0.1、0.2、0.3）和位置（已经阐明了对流特性上的三角形块的Ly = 0.25、0.5、0.75）。通过系统评估流线和温度轮廓来分析型腔中的流动和热模式。通过研究局部以及平均努塞尔数的变化，给出了热传递特性。对于不同的Ri值，平均Nu值以表格的形式显示。与居中的块状位置（L-y = 0.5）相比，其余两个位置（L-y = 0.25，0.75）可获得更高的传热速率。 （C）2018 Elsevier Ltd.保留所有权利。

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