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首页> 外文期刊>International Journal of Heat and Mass Transfer >Natural convection heat transfer in partially open inclined square cavities
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Natural convection heat transfer in partially open inclined square cavities

机译：部分开放的倾斜方腔中的自然对流换热

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摘要

A numerical study has been carried out on inclined partially open square cavities, which are formed by adiabatic walls and a partial opening. The surface of the wall inside the cavity facing the partial opening is isothermal. Steady-state heat transfer by laminar natural convection in a two dimensional partially open cavity is studied by numerically solving equations of mass, momentum and energy. Streamlines and isotherms are produced, heat and mass transfer is calculated. A parametric study is carried out using following parameters: Rayleigh number from 10~3 to 10~6, dimensionless aperture size from 0.25 to 0.75, aperture position at high, center and low, and inclination of the opening from 0° (facing upward) to 120° (facing 30° downward). It is found that the volume flow rate and Nusselt number are an increasing function of Rayleigh number, aperture size and generally aperture position. Other parameters being constant, Nusselt number is a non-linear function of the inclination angle. Depending on the application, heat transfer can be maximized or minimized by selecting appropriate parameters, namely aperture size, aperture position and inclination angle at a given operation Rayleigh number.
机译：已经对由绝热壁和部分开口形成的倾斜的部分开口的方形腔进行了数值研究。腔体内面向部分开口的壁表面是等温的。通过数值求解质量，动量和能量方程，研究了层状自然对流在二维部分开放腔中的稳态传热。产生流线和等温线，计算传热和传质。使用以下参数进行参数研究：瑞利数为10〜3至10〜6，无因次孔径尺寸为0.25至0.75，孔径位置在高，中和低，开口的倾斜度为0°（朝上）至120°（向下30°）。已经发现，体积流率和努塞尔数是瑞利数，孔径大小以及通常孔径位置的增加函数。其他参数是恒定的，努塞尔数是倾斜角的非线性函数。取决于应用，可以通过选择适当的参数（即在给定操作瑞利数下的孔径尺寸，孔径位置和倾斜角度）来最大化或最小化传热。

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