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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Effects of magnetic field on the liquid gallium thermosyphon fluid flow; a numerical study
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Effects of magnetic field on the liquid gallium thermosyphon fluid flow; a numerical study

机译：磁场对液体镓热脊柱液流动的影响;数字研究

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Purpose - This paper aims to numerically study the laminar natural convection in a thermosyphon filled with liquid gallium exposed to a constant magnetic field The left wall of the thermosyphon is at an uniformed hot temperature, whereas the right wall is at a uniform cold temperature. The top and bottom walls are considered to be adiabatic. All walls are electrically insulated. The effects of Hartmann number, in a wide range of Rayleigh number and aspect ratio combinations, on the natural convection throughout the thermosyphon, are investigated and discussed. Furthermore, different forces that influence the natural flow structure are studied. Design/methodology/approach - A Fortran code is developed based on the finite volume method to solve the two-dimensional unsteady governing equations. Findings - Imposing a magnetic field improves the stability of the fluid flow and thus reduces the Nusselt number. For a given Hartmann and Rayleigh number, there is an optimum aspect ratio for which the average velocity becomes maximum. Research limitations/implications - This paper is a two-dimensional investigation. Originality/value - To the best of the authors' knowledge, the effect of the magnetic field on natural convection of liquid gallium in the considered thermosyphon has not been studied numerically in detail. The results of this paper would be helpful in considering the application of the low Prandtl number's liquid metals in thermosyphon MHD generators and certain cooling devices.
机译：目的 - 本文旨在在数值上研究填充到暴露于恒定磁场的液体镓中的热循环中的层状自然对流，热循环的左壁处于均匀的热温度，而右壁处于均匀的寒冷温度。顶部和底墙被认为是绝热的。所有墙壁都是电绝缘的。调查并讨论了Hartmann号，在各种瑞利数和纵横比组合的各种瑞利数和纵横比组合中的影响。此外，研究了影响自然流动结构的不同力。设计/方法/方法 - 基于有限音量方法开发了FORTRAN代码，以解决二维不稳定控制方程。调查结果 - 施加磁场改善了流体流动的稳定性，从而减少了营养数。对于给定的Hartmann和Rayleigh号码，存在最佳纵横比，平均速度变得最大。研究限制/含义 - 本文是一项二维调查。原创性/值 - 据作者所知，磁场对所考虑的热循环中液体镓的自然对流的影响尚未详细地研究。本文的结果有助于考虑在热循环MHD发电机和某些冷却装置中应用低普朗特数量的液体金属的应用。

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