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Numerical Study on the Skin Friction and Heat Transfer Coefficient of Non-Newtonian Power Law Fluid Boundary Layer

机译:非牛顿幂律流体边界层的皮肤摩擦和传热系数的数值研究

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The paper presents a dimensional analysis on the skin friction and heat transfer coefficient of the boundary layer flow in power law fluid.Based on the theoretical analysis the formula of the thickness,the friction coefficient and the heat transfer coefficient in non-Newtonian power law fluid boundary layer are obtained.By means of numerical simulation the phenomenon of power law fluid flowing on an infinite surface is studied.The temperature distribution is obtained numerically by considering the effect of the power law viscosity on thermal diffusivity and the characteristics of the flow and heat transfer are analyzed.The numerical results proved that the proposed estimate formula is reliable and effective.The results of the data analysis show that the estimation formula above mentioned is coincident well with the data from numerical simulation.The results show that the distribution of the thermal boundary layer depends not only on the velocity ratio parameter of the plate,but also on the power law index and Prandtl number of fluids.
机译:本文对幂律流体中边界层流动的表皮摩擦和传热系数进行了尺寸分析。在理论分析的基础上,对非牛顿幂律流体的厚度,摩擦系数和传热系数进行了计算。通过数值模拟研究了幂律流体在无限表面上流动的现象,并考虑了幂律粘度对热扩散系数的影响以及流动和热的特性,通过数值方法获得了温度分布。数值结果证明了所提出的估计公式是可靠有效的。数据分析结果表明,上述估计公式与数值模拟的数据吻合良好。边界层不仅取决于板的速度比参数,还取决于幂律指数和流体的Prandtl数。

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