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首页> 外文期刊>International Journal of Heat and Mass Transfer >A numerical study of natural convection in an inclined square enclosure with an elliptic cylinder using variational multiscale element free Galerkin method
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A numerical study of natural convection in an inclined square enclosure with an elliptic cylinder using variational multiscale element free Galerkin method

机译:基于变分多尺度无网格Galerkin方法的椭圆柱形正方形矩形罩内自然对流数值研究。

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摘要

In this paper, a numerical study for steady-state natural convection in a cold outer square enclosure containing a hot inner elliptic cylinder is investigated using the variational multiscale element free Galerkin method (VMEFG). The VMEFG method is a meshless method which coupled element free Galerkin method and variational multiscale method, it allows equal order basis for the velocity and the pressure field. The numerical calculations are performed for various Rayleigh numbers ranging from 103 to 106, the inclination angle of the outer square enclosure from 0° to 45° and major axis of the inner cylinder from 0.2 L to 0.4 L. The results show that the Rayleigh number, the size of the inner cylinder and the inclination angle of the outer square enclosure have remarkable effects on the streamlines and temperature contours in the enclosure, but the inclination angle of the enclosure has a small effect on average Nusselt number on the inner elliptic cylinder.
机译:在本文中,使用变分多尺度无元素Galerkin方法(VMEFG),对包含热内部椭圆圆柱的冷外部正方形外壳中的稳态自然对流进行了数值研究。 VMEFG方法是一种无网格方法,它结合了无元素Galerkin方法和变分多尺度方法,它为速度和压力场提供了相等的阶次基础。对范围从103到106的各种瑞利数,外部方形外壳的倾斜角从0°至45°以及内圆柱的长轴从0.2 L至0.4 L进行了数值计算。结果表明,瑞利数,内部圆柱体的大小和外部方形外壳的倾斜角度对外壳中的流线和温度轮廓有显着影响,但是外壳的倾斜角度对内部椭圆圆柱体上的平均Nusselt值影响较小。

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