%0 Journal Article
%T 垂直指数延伸板驻点混合对流与传热研究<br>Mixed convection and heat transfer of stagnation-point flow towards an exponentially stretching vertical sheet
%A 许晓勤
%A 陈淑梅
%J 福州大学学报(自然科学版)
%D 2016
%R 10.7631/issn.1000-2243.2016.06.0807
%X 研究不可压缩粘性流体在垂直指数延伸壁面上的二维驻点混合对流与传热问题，借助相似变换将边界层控制方程转换为非线性常微分方程，通过打靶法对其进行数值计算，用图表详细分析顺流和逆流时浮力参数λ和Prandtl数Pr对流体流动和传热特性的影响. 结果显示：顺流时，表面摩擦系数和Nusselt数均随浮力参数λ的增大而增大；随着Pr数增大，Nusselt数增大而表面摩擦系数减小. 逆流时，表面摩擦系数和Nusselt数均随浮力参数λ的增大而减小，随Pr增大而增大.<br>The paper studies the mixed convection flow and heat transfer of an incompressible viscous fluid about a stagnation point on an exponentially stretching vertical sheet. The governing equations describing the stagnation point flow are reduced to differential equations by using the similarity transformations and numerically solved through the shooting method. Finally，the effects of the buoyancy parameter and the Prandtl number on the features of the flow and heat transfer characteristics are analyzed and discussed in detail. The results show that for assisting flow，both the skin friction coefficient and the Nusselt number increase as the buoyancy parameter increases，while only the Nusselt number increases but the skin friction coefficient decreases as the Prandtl number increases. For opposing flow，both the skin friction coefficient and the Nusselt number decrease as the buoyancy parameter increases，but both increase as the Prandtl number increases
%K 垂直指数延伸板 驻点流 混合对流 传热 边界层&lt
%K br&gt
%K exponentially stretching vertical sheet stagnation-point flow mixed convection heat transfer boundary layer
%U http://xbzrb.fzu.edu.cn/ch/reader/view_abstract.aspx?file_no=201606008&flag=1