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首页> 外文期刊>International Journal of Heat and Mass Transfer >Modeling heat transfer in dilute two-phase flows using the Mesoscopic Eulerian Formalism
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Modeling heat transfer in dilute two-phase flows using the Mesoscopic Eulerian Formalism

机译：使用介观欧拉形式主义对稀薄两相流中的传热建模

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摘要

In dilute two-phase flows, the accurate prediction of the temperature of the dispersed phase can be of paramount importance. Indeed, processes such as evaporation or chemical reactions are strongly non-linear functions of heat transfer between the carrier and dispersed phases. This study is devoted to the validation of an Eulerian description of the dispersed phase - the Mesoscopic Eulerian Formalism (MEF) - in the case of non-isothermal flows. Direct Numerical Simulations using the MEF are compared to a reference Lagrangian simulation for a two-dimensional non-isothermal turbulent jet laden with solid particles. The objectives of this paper are (1) to study the influence of the thermal inertia of particles on their temperature distribution and (2) conduct an a posteriori validation of the MEF, which was recently extended to non-isothermal flows. The focus is on the influence of additional terms in the MEF governing equations, namely heat fluxes arising from the Random Uncorrelated Motion (RUM). Results show that mean and rms of particle temperature are strongly dependent of the thermal Stokes number. The mean temperature is satisfactorily predicted by the MEF, comparing to the Lagrangian reference. Under the conditions of the present study, the RUM heat fluxes have a marginal influence on the mean particle temperature. However, a significant impact was observed on the magnitude of particle temperature fluctuations. Neglecting the RUM heat fluxes leads to erroneous results while the Lagrangian statistics are recovered when it is accounted for in the regimes of low to moderate thermal Stokes number.
机译：在稀薄的两相流中，精确预测分散相的温度至关重要。实际上，诸如蒸发或化学反应的过程是载体和分散相之间的热传递的强烈非线性函数。这项研究致力于验证非等温流动情况下对分散相的欧拉描述-介观欧拉形式主义（MEF）。使用MEF进行的直接数值模拟与带有固体颗粒的二维非等温湍流射流的参考拉格朗日模拟进行了比较。本文的目的是（1）研究粒子的热惯性对其温度分布的影响；（2）对MEF进行后验验证，最近将其扩展到非等温流动。重点是MEF控制方程中其他项的影响，即由随机不相关运动（RUM）引起的热通量。结果表明，颗粒温度的均值和均方根值强烈依赖于热斯托克斯数。与拉格朗日基准相比，MEF可以令人满意地预测平均温度。在本研究的条件下，朗姆酒的热通量对平均颗粒温度有边际影响。但是，观察到了对颗粒温度波动幅度的重大影响。忽略RUM热通量会导致错误的结果，而当在低到中等的热斯托克斯数范围内考虑时，拉格朗日统计数据将被恢复。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第6期|p.1486-1495|共10页
  • 作者

    J. Dombard; B. Leveugle; L. Selle; J. Reveillon; T. Poinsot; Y. DAngelo;

  • 作者单位

    Universite de Toulouse, INPT, UPS, 1MFT (Institut de Mecanique des Fluides de Toulouse), Allee Camille Soula, F-31400 Toulouse, France,CNRS, IMFT, F-31400 Toulouse, France;

    University of Rouen, CORIA UMR-CNRS, 6614, Avenue de IVniversite, 76801 Saint Etienne du Rouvray, France;

    Universite de Toulouse, INPT, UPS, 1MFT (Institut de Mecanique des Fluides de Toulouse), Allee Camille Soula, F-31400 Toulouse, France,CNRS, IMFT, F-31400 Toulouse, France;

    University of Rouen, CORIA UMR-CNRS, 6614, Avenue de IVniversite, 76801 Saint Etienne du Rouvray, France;

    Universite de Toulouse, INPT, UPS, 1MFT (Institut de Mecanique des Fluides de Toulouse), Allee Camille Soula, F-31400 Toulouse, France,CNRS, IMFT, F-31400 Toulouse, France;

    University of Rouen, CORIA UMR-CNRS, 6614, Avenue de IVniversite, 76801 Saint Etienne du Rouvray, 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

    particle-laden flows; mesoscopic eulerian formalism; eulerian-eulerian approach; heat transfer;

    机译：充满粒子的流介观欧拉形式主义欧拉-欧拉方法传播热量;

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