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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Effect of trapezoidal heater on natural convection heat transfer and fluid flow inside a cubical cavity
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Effect of trapezoidal heater on natural convection heat transfer and fluid flow inside a cubical cavity

机译：梯形加热器对自然对流换热和立方腔内流体流动的影响

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Purpose The purpose of this paper is to investigate natural convective heat transfer in a cubical cavity with the heat source of a trapezoidal form having a constant temperature.Design/methodology/approach The domain of interest is a cubical cavity with two isothermal opposite vertical walls, while other walls are adiabatic. A discrete heater of a trapezoidal shape is located at the bottom wall of the cavity. Governing equations formulated in dimensionless vector potential functions, vorticity vector and temperature with corresponding initial and boundary conditions have been solved numerically using a developed computational code based on the finite difference method.Findings The results show that the variation of geometric parameters, such as height, length and size of the local heater, significantly influences the evolution of a temperature field and fluid flow inside the enclosure. The effects of Rayleigh number and time on streamlines, isotherms and average Nusselt number have been studied.Originality/value The originality of this work is to explore three-dimensional (3D) natural convection in a cubical cavity with a local heat source of trapezoidal shape, to analyze the effects of heater geometric parameters and to compare obtained 3D data with two-dimensional results.
机译：目的本文的目的是研究具有恒定温度的梯形形式的热源的立方腔中的自然对流传热。设计/方法/方法感兴趣的领域是具有两个等温相对的垂直壁的立方腔，而其他墙壁是绝热的。梯形的离散加热器位于空腔的底壁处。利用基于有限差分法的计算代码，对由无量纲矢量势函数，旋涡矢量和温度以及相应的初始条件和边界条件公式化的控制方程进行了数值求解。结果表明，几何参数（例如高度，局部加热器的长度和大小会显着影响温度场的演变以及机箱内部的流体流动。研究了瑞利数和时间对流线，等温线和平均Nusselt数的影响。原创性/价值这项工作的独创性是探索具有局部梯形形状热源的立方腔中的三维（3D）自然对流，以分析加热器几何参数的影响，并将获得的3D数据与二维结果进行比较。

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