This paper reports the numerical simulations on buoyant thermal transfer inside the finite porous cylindrical annular region with a thin circular baffle attached to inner cylinder. The main objective of this investigation is to provide a detailed impact of baffle on flow and heat transport rates due to the direct relevance of this problem to the design of heat exchangers. The side walls of annular enclosure are maintained at uniform, but different temperatures, while the top and bottom walls are insulated. The Brinkman-extended Darcy model is adopted for the momentum equations, and simulations of the governing PDEs are performed using the ADI and SLOR algorithms. The predictions from the present simulations detected that the size and position of baffle has predominant impact on buoyant flow and thermal transport characteristics. It has been detected that the thermal dissipation rates could be enhanced by positioning the baffle near the upper boundary, while increasing the baffle length leads to the reduction of thermal transport. The size and location of baffle emerges out as an important quantity in regulating the global thermal transfer through modifying the flow regimes in the annular geometry. Interestingly, the magnitude of flow circulation enhances with an increase in Rayleigh and Darcy numbers for any baffle length and position.

本文报道了有限的多孔圆柱环形区域内部的薄壁圆形挡板与浮力传热的数值模拟。这项研究的主要目的是要提供折流板对流量和传热速率的详细影响，因为这个问题与换热器的设计直接相关。环形外壳的侧壁保持均匀但不同的温度，而顶壁和底壁是绝缘的。动量方程采用Brinkman扩展的Darcy模型，并使用ADI和SLOR算法对控制的PDE进行仿真。根据当前模拟的预测，检测到挡板的大小和位置对浮力流和热传递特性有主要影响。已经发现，通过将挡板设置在上边界附近可以提高散热率，而增加挡板的长度则导致热传递的减少。挡板的大小和位置作为通过修改环形几何形状中的流态来调节全局热传递的重要参数而出现。有趣的是，对于任何挡板长度和位置，流环流的大小都会随着瑞利和达西数的增加而增加。挡板的大小和位置作为通过修改环形几何形状中的流态来调节全局热传递的重要参数而出现。有趣的是，对于任何挡板长度和位置，流环流的大小都会随着瑞利和达西数的增加而增加。挡板的大小和位置作为通过修改环形几何形状中的流态来调节整体热传递的重要参数而出现。有趣的是，对于任何挡板长度和位置，流环流的大小都会随着瑞利和达西数的增加而增加。