倾斜封闭方腔内自然对流换热的数值模拟

摘要

The phenomena of natural convection heat transfer in two-dimensional inclined closed square cavity is studied by using finite element method and one - dimensional mathematic model. It is ob-tained the flow field, temperature field, high temperature of wall local Nusselt number and average Nusselt number by numerical simulation. It analyzes the influence of inclination angle and the Rayleigh number on the natural convection heat transfer in an inclined closed square cavity. According to the results of the nu-merical simulation, the best inclined angle and Rayleigh number to have a positive impact on the natural convection heat transfer is obtained.%利用一区域数学模型，采用有限元法对二维倾斜封闭方腔内自然对流换热现象进行了研究。通过数值模拟得到了倾斜封闭方腔内的流场、温度场、高温壁面局部Nusselt数和平均Nusselt数，着重分析倾斜角θ和Ra数对封闭方腔内自然对流换热的影响。再根据数值模拟结果获得对自然对流换热产生积极影响的最佳倾斜角度θ和Ra数。