INVESTIGATION OF LID-DRIVEN SPEED ON MIXED CONVECTION HEAT TRANSFER IN TWO DIMENSIONAL CAVITIES CONTAINING RADIATING GASES BY NUMERICAL METHOD
INVESTIGATION OF LID-DRIVEN SPEED ON MIXED CONVECTION HEAT TRANSFER IN TWO DIMENSIONAL CAVITIES CONTAINING RADIATING GASES BY NUMERICAL METHOD
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含辐射气体的二维腔内混合对流换热盖驱动速度的数值研究
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Gandjalikhan Seyed Abdolreza
中科院分区：
文献类型：
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作者：
Moein Addini Maryam;Gandjalikhan Seyed Abdolreza
原始研究论文于2016年1月6日接收于2016年2月3日接受于2016年3月5日在线提供本研究对倾斜盖驱动腔中辐射气体的层流混合对流进行了数值研究。流体被视为灰色的吸收、发射和散射介质。采用计算流体动力学（CFD）技术对连续性、动量和能量组成的控制微分方程进行数值求解，得到了速度场和温度场。这些方程的离散形式得到的有限体积法和求解使用SIMPLE算法。由于气体被认为是一种辐射介质，除了对流和传导，辐射传热也发生在气体流动。为了计算气体能量方程中的辐射项，采用离散纵标法（DOM）数值求解辐射传递方程（RTE）。研究了顶盖驱动速度对二维空腔热流体动力学行为的影响。结果显示为等温线、流线以及对流和总努塞尔数沿着空腔底壁的分布。结果表明，随着雷诺数的增加，腔内温度分布趋于均匀，特别是在倾角为30°和60°的情况下。
Original Research Paper Received 06 January 2016 Accepted 03 February 2016 Available Online 05 March 2016 This study presents a numerical investigation for laminar mixed convection flow of radiating gases in an inclined lid-driven cavity. The fluid is treated as a gray, absorbing, emitting and scattering medium. The governing differential equations consisting of the continuity, momentum and energy are solved numerically by the computational fluid dynamics (CFD) techniques to obtain the velocity and temperature fields. Discretized forms of these equations are obtained by the finite volume method and solved using the SIMPLE algorithm. Since the gas is considered as a radiating medium, besides convection and conduction, radiative heat transfer also takes place in the gas flow. For computation of the radiative term in the gas energy equation, the radiative transfer equation (RTE) is solved numerically by the discrete ordinate method (DOM). The effect of lid driven speed on the thermohydrodynamic behavior of two-dimensional cavity is carried out. Results are shown as contours of isotherms, streamlines and distributions of convective and total Nusselt numbers along the bottom wall of cavity. It is revealed that increase in Reynolds number causes almost uniform temperature distribution in cavity, especially for 30° and 60° inclination angles.