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首页> 外文期刊>International Journal of Heat and Mass Transfer >From natural to mixed convection in horizontal and differentially heated annular ducts: Linear stability analysis
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From natural to mixed convection in horizontal and differentially heated annular ducts: Linear stability analysis

机译：从水平对流和差热式环形管道的自然对流到混合对流：线性稳定性分析

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摘要

Linear stability analysis of a fully developed mixed convection flow of air in an annular horizontal duct is numerically investigated for the radius ratio R- 1.2, a Peclet and a Rayleigh number less than 200 and 6000, respectively. An iterative method is developed to enable the convergence of the dimensionless parameters to their marginal values at the transition. New mixed convection flows are highlighted that are highly correlated with those obtained in natural convection problems under the assumption of two dimensionality. The synthesis of our results on the transitions permits us to build the map of stability for the steady and established mixed convection flows and clearly shows the occurrence of multiplicity of solutions for some couples of Rayleigh and PSclet numbers.
机译：分别对半径比R-1.2，佩克利（Peclet）和瑞利数分别小于200和6000的数值研究了环形水平管道中完全展开的混合对流的线性稳定性分析。开发了一种迭代方法以使无量纲参数在过渡时收敛到其边际值。强调了新的混合对流，它与在二维假设下自然对流问题中获得的高度相关。对过渡结果的综合使我们能够建立稳定和已建立的混合对流的稳定性图，并清楚地显示了瑞利数和PSclet数对的解的多重性。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第24期|p.5100-5108|共9页
  • 作者

    E. Chenier; G. Petrone; G. Lauriat;

  • 作者单位

    Laboratoire Modélisation et Simulation Multi Echelle, UMR 8208 CNRS, Universiti Paris-Est Marne-la-Vatlte, BStiment Lavoisier, 5 Boulevard Descartes, 77454 MARNE-LA-VALLEE Cedex 2, France;

    Dipartimento di Ingegneria Industrial e Meccanica, Universita degli Studi di Catania, V.le A. Doria 6, 95125 Catania, Italy;

    Laboratoire Modélisation et Simulation Multi Echelle, UMR 8208 CNRS, Universiti Paris-Est Marne-la-Vatlte, BStiment Lavoisier, 5 Boulevard Descartes, 77454 MARNE-LA-VALLEE Cedex 2, France;

  • 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

    Mixed convection; Horizontal annulus; Stability analysis;

    机译：混合对流;水平环;稳定性分析;

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