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3d Conjugate Heat Transfer With Thermal Radiation In A Hollow Cube Exposed To External Flow

机译:暴露于外部流的空心立方体中的3d共轭传热与热辐射

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摘要

The interaction of an asymmetrically heated cube envelope exposed to turbulent external flow is numerically studied using a three dimensional computational fluid dynamics control volume approach with conjugate heat transfer, including thermal radiation effects. An analytical approach is used for thermal radiation modelling with an implicit boundary condition for convective and radiative heat transfer at solid-fluid interfaces. For external flow Reynolds numbers of 2 × 10~5-10~6 and heat flux values of q - 20, 40 W m~(-2), a weak but turbulent (Ra = 1.5-5 × 10~9) buoyant flow is induced inside the cube. The temperature distribution of the inner surfaces is significantly affected by heat flux orientation with regard to external flow as well as the relative influence of convective and thermal radiation heat transfer.
机译:使用三维计算流体动力学控制体积方法和共轭传热(包括热辐射效应),对暴露于湍流外部流的不对称加热立方体外壳的相互作用进行了数值研究。分析方法用于具有隐式边界条件的热辐射建模,用于固-液界面处的对流和辐射热传递。外流雷诺数为2×10〜5-10〜6且热通量值为q-20、40 W m〜(-2)时,浮力弱但湍流(Ra = 1.5-5×10〜9)在立方体内部感应。内表面的温度分布受外流热通量方向以及对流和热辐射传热的相对影响影响很大。

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