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Lattice Boltzmann Simulation of Natural Convection in an Annulus between a Hexagonal Cylinder and a Square Enclosure

机译:六边形圆柱与方形罩之间环空中自然对流的格子Boltzmann模拟

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摘要

Laminar natural convection in a water filled square enclosure containing at its center a horizontal hexagonal cylinder is studied by the lattice Boltzmann method. The hexagonal cylinder is heated while the walls of the cavity are maintained at the same cold temperature. Two orientations are treated, corresponding to two opposite sides of the hexagonal cross-section which are horizontal (case I) or vertical (case II). For each case, the results are presented in terms of streamlines, isotherms, local and average convective heat transfers as a function of the dimensionless size of the hexagonal cylinder cross-section (0.1 <= B <= 0.4), and the Rayleigh number (10(3) <= Ra <= 10(6)).
机译:通过格子玻尔兹曼方法研究了在一个充满水的方形外壳中的层流自然对流,该方形外壳的中心包含一个水平的六边形圆柱体。加热六角形圆柱体,同时将空腔壁保持在相同的低温下。处理了两个方向,分别对应于六边形横截面的两个相对边,即水平(情况I)或垂直(情况II)。对于每种情况,结果均以流线,等温线,局部和平均对流传热的形式表示,这些传热是六角圆柱横截面的无量纲尺寸(0.1 <= B <= 0.4)和瑞利数( 10(3)<= Ra <= 10(6))。

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  • 来源
    《Mathematical Problems in Engineering》 |2017年第6期|3834170.1-3834170.11|共11页
  • 作者单位

    Cadi Ayyad Univ, LMFE, Fac Sci Semlalia, BP 2390, Marrakech 40000, Morocco;

    Cadi Ayyad Univ, LMFE, Fac Sci Semlalia, BP 2390, Marrakech 40000, Morocco;

    Cadi Ayyad Univ, LMFE, Fac Sci Semlalia, BP 2390, Marrakech 40000, Morocco;

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