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首页> 外文期刊>Journal of the Institution of Engineers (Inida) >Mixed Convection with Conduction and Surface Radiation from a Vertical Channel with Discrete Heating
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Mixed Convection with Conduction and Surface Radiation from a Vertical Channel with Discrete Heating

机译：离散加热的垂直通道中具有传导和表面辐射的混合对流

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摘要

A numerical investigation into fluid flow and heat transfer for the geometry of a vertical parallel plate channel subjected to conjugate mixed convection with radiation is attempted here. The channel considered has three identical flush-mounted discrete heat sources in its left wall, while the right wall that does not contain any heat source acts as a sink. Air, assumed to be a radiatively nonparticipating and having constant thermophysical properties subject to the Boussinesq approximation, is the cooling agent. The heat generated in the left wall gets conducted along it and is later dissipated by mixed convection and radiation. The governing equations, considered in their full strength sans the boundary layer approximations, are converted into vorticity-stream function form and are then normalized. These equations along with pertinent boundary conditions are solved through finite volume method coupled with Gauss-Seidel iterative technique. The effects of modified Richardson number, surface emissivity, thermal conductivity and aspect ratio on local temperature distribution along the channel, maximum channel temperature and relative contributions of mixed convection and radiation have been thoroughly studied. The prominence of radiation in the present problem has been highlighted.
机译：在此尝试对垂直平行板通道的几何形状进行流体流动和传热的数值研究，该通道经过辐射共轭混合对流。所考虑的通道在其左壁上具有三个相同的齐平安装的离散热源，而不包含任何热源的右壁用作散热器。假定为辐射不参与且具有恒定的热物理性质（受Boussinesq近似影响）的空气是冷却剂。左壁中产生的热量沿其传导，随后通过混合对流和辐射消散。在不考虑边界层近似的情况下，以其全部强度考虑的控制方程式被转换为涡流函数形式，然后进行归一化。这些方程以及相关的边界条件是通过有限体积法和高斯-赛德尔迭代技术相结合求解的。彻底研究了修正的理查森数，表面发射率，导热系数和纵横比对沿通道局部温度分布，最大通道温度以及混合对流和辐射的相对贡献的影响。在当前问题中辐射的突出已经被强调。

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