Buoyancy force and magnetic field effects on laminar vortex breakdown and fluid layers

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-11 DOI:10.18186/thermal.1232431

B. Mahfoud, M. Moussaoui

引用次数: 1

Abstract

In this study, the Generalized Integral Transformation Technique (GITT) is used to describe the effect of buoyancy force and magnetic field on the vortex breakdown process generated by the rotation of an electrically conductive fluid. A magnetic field is positioned vertically to stabilize the swirling flow caused by the rotation of the bottom disc of a cylindrical recipient. Three fluids were compared in this study where the range of Richardson number is 0 ≤Ri ≤2.0. When the temperature difference is greater than Ri = 0.1, many layers become visible. These stratified flu id layers act as thermal insulators. In the case of stratification, the increased magnetic field reduces the total number of layers formed in the fluid. The influence of gradient temperature on the distribution of the layers generated is discussed. The limitations between the multilayer structure and the monolayer structure for three fluids are calculated as a function of the flow parameters.

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浮力和磁场对层流涡破裂和流体层的影响

本研究采用广义积分变换技术（GITT）来描述浮力和磁场对导电流体旋转产生的涡流击穿过程的影响。垂直放置磁场以稳定由圆柱形接收器的底部圆盘的旋转引起的涡流。本研究中比较了三种流体，其中理查森数的范围为0≤Ri≤2.0。当温度差大于Ri＝0.1时，许多层变得可见。这些分层的流感病毒层起着隔热层的作用。在分层的情况下，增加的磁场减少了在流体中形成的层的总数。讨论了梯度温度对生成层分布的影响。三种流体的多层结构和单层结构之间的限制被计算为流动参数的函数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.