首页> 外文期刊>International Journal of Heat and Mass Transfer >HEAT CONVECTION FROM A SPHERE PLACED IN AN OSCILLATING FREE STREAM
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HEAT CONVECTION FROM A SPHERE PLACED IN AN OSCILLATING FREE STREAM

机译:放置在振荡自由流中的球的热对流

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The problem of heat convection from a sphere placed in an oscillating viscous free stream is considered for the two cases of forced and mixed convection regimes. The sphere surface is assumed isothermal and the free-stream oscillations are always in the vertical direction resulting in axisymmetric flow and thermal fields for both regimes. The study is based on the solution of the unsteady Navier-Stokes and energy equations for a Boussinesq fluid of constant Prandtl number (Pr=0.71).The main parameters considered are the Reynolds number, Grashof number, and Strouhal number. Comparison of results with published data shows a good agreement for the special case of steady forced and mixed convection. The data is of the resulting thermal fields are presented in the form of isotherm patterns and the local Nusselt number distribution.
机译:对于强迫对流和混合对流两种情况,都考虑了来自放置在振荡的粘性自由流中的球体的热对流问题。假设球体表面是等温的,自由流振荡始终在垂直方向上,从而导致两种状态下的轴对称流动和热场。该研究基于常数Prandtl数(Pr = 0.71)的Boussinesq流体的非定常Navier-Stokes和能量方程的求解,其中考虑的主要参数是雷诺数,Grashof数和Strouhal数。结果与已公开数据的比较表明,在稳定对流和强制对流的特殊情况下,可以很好地吻合。所得热场的数据以等温线图和局部努塞尔数分布的形式表示。

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