Natural convection of fluid with variable viscosity and viscous dissipation from a heated vertical wavy surface in presence of magnetic field

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2020-12-27 DOI:10.3329/JNAME.V17I2.45674

N. Parveen, M. Alim

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引用次数: 4

Abstract

ABSTRACT The present numerical work describes the effect of the temperature dependent variable viscosity and viscous dissipation on natural convection heat transfer boundary layer flow of a viscous incompressible electrically conducting fluid along a vertical wavy surface in presence of a transverse magnetic field. The wavy surface is maintained at uniform wall temperature that is higher than that of the ambient. A simple coordinate transformation is employed to transform the wavy surface into a flat plate. A marching finite difference scheme is used for present analysis. The numerical results, including the developments of the skin friction coefficients, the local Nusselt number, the streamlines as well as the isotherms are presented and discussed in detail. The results of this investigation illustrated that the skin friction coefficient increase with an increase of the variable viscosity and viscous dissipation parameter, while the local Nusselt number at the heated surface decrease with increasing values of variable viscosity, intensity of magnetic field and viscous dissipation parameter.

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在磁场作用下，变粘度流体的自然对流和从加热的垂直波浪表面上的粘性耗散

摘要本文的数值工作描述了在横向磁场存在的情况下，温度相关的变粘度和粘性耗散对粘性不可压缩导电流体沿垂直波状表面的自然对流传热边界层流动的影响。波状表面保持在均匀的壁温下，该壁温高于环境温度。采用简单的坐标变换将波浪形表面变换为平板。本文采用了一种行进有限差分格式进行分析。给出并详细讨论了数值结果，包括表面摩擦系数、局部努塞尔数、流线和等温线的发展。研究结果表明，表皮摩擦系数随着变粘度和粘性耗散参数的增加而增加，而受热面处的局部努塞尔数随着变粘度、磁场强度和粘性耗散系数的增加而减小。

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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.