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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical prediction of flow and heat transfer of power-law fluids in a plane channel with a built-in heated square cylinder
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Numerical prediction of flow and heat transfer of power-law fluids in a plane channel with a built-in heated square cylinder

机译：内置加热的方形圆柱体的平面通道中幂律流体的流动和传热的数值预测

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摘要

Structure of unsteady laminar flow and heat transfer of power-law fluids in two-dimensional horizontal plane channel with a built-in heated square cylinder is studied numerically. The governing equations are solved using a control volume finite element method (CVFEM) adapted to the staggered grid. Computations are performed over a range of Reynolds and Richardson numbers from Re - 20 to 200 and from Ri = 0 to 8, respectively at fixed Prandtl number β = 50 and blockage ratio value β = 1/8. Three different values of the power-law index (n = 0.5,1 and 1.4) are considered in this study to show its effect on the value of the critical Reynolds number defining the transition between two different flow regimes (symmetrical and periodic flows), the variations of Strouhal number, drag and lift coefficients and the heat transfer from the square cylinder as function of Reynolds number. Heat transfer correlations are obtained through forced convection. A discussion about the buoyancy effect on the flow pattern and the heat transfer for different power-law index is also presented.
机译：数值研究了带有内置加热方筒的二维水平面通道中幂律流体的非定常层流结构和传热。使用适合于交错网格的控制体积有限元方法（CVFEM）求解控制方程。在固定的普朗特数β= 50和阻塞比值β= 1/8的情况下，分别在Re-20至200和Ri = 0至8的雷诺数和理查森数范围内进行计算。在这项研究中考虑了三种不同的幂律指数值（n = 0.5、1和1.4），以显示其对定义两个不同流态（对称流和周期性流）之间过渡的临界雷诺数的影响，斯特劳哈尔数，阻力和升力系数的变化以及方筒传热与雷诺数的关系。传热相关性通过强制对流获得。还讨论了浮力对不同幂律指数的流型和传热的影响。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2010年第24期|p.5420-5429|共10页
  • 作者

    V. VinS; J. Hruby; V. Vacek;

  • 作者单位

    Laboratory of Computational Fluid Dynamics and Transfer Phenomena, National Engineering School of Sfax, Tunisia Department of Mechanical, National Engineering School of Sfax, BP W-3038, 1173 Sfax, Tunisia;

    rnLaboratory of Computational Fluid Dynamics and Transfer Phenomena, National Engineering School of Sfax, Tunisia Department of Mechanical, National Engineering School of Sfax, BP W-3038, 1173 Sfax, Tunisia;

    Laboratory of Computational Fluid Dynamics and Transfer Phenomena, National Engineering School of Sfax, Tunisia Faculty of Sciences of Sfax, Department of Physics. BP 1171, 3000 Sfax, Tunisia;

  • 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
  • 中图分类
  • 关键词

    power-law fluid; strouhal number; lift coefficient; drag coefficient; periodic flow; heat transfer;

    机译：幂律流体数升力系数阻力系数周期性流动传播热量;

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