首页> 外文会议>ASME biennial conference on engineering systems design and analysis;ESDA2010 >NATURAL CONVECTION-RADIATION HEAT TRANSFER IN RECTANGULAR CAVITY WITH THE PRESENCE OF PARTICIPATING MEDIA
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NATURAL CONVECTION-RADIATION HEAT TRANSFER IN RECTANGULAR CAVITY WITH THE PRESENCE OF PARTICIPATING MEDIA

机译:存在参与介质的矩形腔内自然对流-辐射换热

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The problem of natural convection radiation with the presence of participating fluid in a tilted square cavity has been investigated numerically. Two vertical walls are at uniform different temperatures while the others are adiabatic. The working fluid is taken as grey, absorbing, emitting and non-scattering. The finite volume method is used to solve the dimensionless governing equations and SIMPLE algorithm is applied for pressure velocity coupling. The radiative heat flux gradient is estimated by finding radiative intensities from the radiative transfer equation (RTE). A very recent method, called the Q_L method, is utilized to solve RTE. In this study the effects of the inclination angle, Rayleigh number and optical thickness on the heat transfer and flow characteristics are studied. A great accuracy in the results was observed in the prediction of flow contours and average radiative and convective Nusselt numbers at walls.
机译:数值研究了在倾斜方腔中存在参与流体的自然对流辐射问题。两个垂直壁处于统一的不同温度,而其他垂直壁则是绝热的。工作流体为灰色,吸收,发射和不散射。有限体积法用于求解无量纲控制方程,SIMPLE算法用于压力速度耦合。辐射热通量梯度是通过从辐射传递方程(RTE)中找到辐射强度来估算的。一种非常新的方法称为Q_L方法,用于解决RTE。在这项研究中,研究了倾角,瑞利数和光学厚度对传热和流动特性的影响。在预测流动轮廓以及壁的平均辐射和对流努塞尔数时,观察到的结果具有很高的准确性。

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