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首页> 外文期刊>Journal of Heat Transfer >Unsteady Flow and Heat Transfer Characteristics of Fluid Flow Over a Shrinking Permeable Infinite Long Cylinder
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Unsteady Flow and Heat Transfer Characteristics of Fluid Flow Over a Shrinking Permeable Infinite Long Cylinder

机译：收缩可渗透无限长圆柱体上流体流动的非定常流动和传热特性

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摘要

The present work studies the unsteady, viscous, and incompressible laminar flow and heat transfer over a shrinking permeable cylinder. The unsteady nonlinear Navier-Stokes and energy equations are reduced, using similarity transformations, to a system of nonlinear ordinary differential equations. The boundary conditions associated with the governing equations are the time dependent surface temperature and flow conditions. The method of solution is based on a combination of the implicit Runge-Kutta method and the shooting method. The present study predicts two solutions for both the flow and heat transfer fields, and a unique solution at a specific critical unsteadiness parameter. An analysis of the results, for a specific suction parameter, suggests that the corresponding unique unsteadiness parameter does not depend on the Prandtl number. However, the unique rate of heat transfer is increasing as the Prandtl number increases. In addition, our results confirm that the unique value of heat transfer rate increases as the suction parameter increases, regardless the value of the Prandtl number.
机译：本工作研究了在收缩的可渗透圆柱体上的不稳定，粘性和不可压缩的层流和热传递。使用相似变换，将非稳态非线性Navier-Stokes和能量方程简化为非线性常微分方程组。与控制方程式相关的边界条件是时间相关的表面温度和流动条件。解决方法基于隐式Runge-Kutta方法和射击方法的组合。本研究预测了流动和传热场的两种解决方案，以及在特定的临界不稳定参数下的唯一解决方案。针对特定吸力参数的结果分析表明，相应的唯一不稳定参数与Prandtl数无关。但是，随着普朗特数的增加，独特的传热速率也在增加。此外，我们的结果证实，无论Prandtl值如何，传热速率的唯一值都随着吸力参数的增加而增加。

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  • 来源
    《Journal of Heat Transfer》 |2016年第9期|091008.1-091008.8|共8页
  • 作者

    Emad J. Elnajjar; Qasem M. Al-Mdallal; Fathi M. Allan;

  • 作者单位

    Department of Mechanical Engineering, UAE University, P.O. Box 15551, Al Ain, UAE;

    Department of Mathematical Sciences, UAE University, P.O. Box 15551, Al Ain, UAE;

    Department of Mathematical Sciences, UAE University, P.O. Box 15551, Al Ain, UAE;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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