辐射流体流经垂直时变移动板时的非稳态 MHD 自由对流与斜坡双扩散条件

IF 1.3 4区 工程技术 Q3 ENGINEERING, MECHANICAL
H. K. Mandal, D. K. Maiti, R. N. Jana
{"title":"辐射流体流经垂直时变移动板时的非稳态 MHD 自由对流与斜坡双扩散条件","authors":"H. K. Mandal,&nbsp;D. K. Maiti,&nbsp;R. N. Jana","doi":"10.1134/S1810232824030135","DOIUrl":null,"url":null,"abstract":"<p>An unsteady MHD-free convection heat-mass transfer from a viscous, incompressible fluid flow past an infinite vertical moving plate is studied here. The fluid is considered to be electrically conducting and chemically reacting. We consider three types of plate movements: uniform velocity, uniform acceleration, and periodic acceleration. Ramped as well as constant conditions at the plate for both temperature and concentration are considered. We obtain the exact solutions of the governing equations using the method of the Laplace transform technique. The impact of the type of thermal and concentration boundary condition (constant/ramped) at the plate as well as the kind of plate movement on the flow, heat and mass transfer characteristics, are presented and analyzed here. While doing so, we also consider the variation of our governing parameters: thermal and solutal Grashof numbers, magnetic field intensity, radiation (<span>\\(R\\)</span>), chemical reaction (<span>\\(Kc\\)</span>), Prandtl number and Schmidt numbers. It is observed that the presence of buoyancy and other forces close to the plate can be almost nullified due to the imposition of a strong transverse magnetic field. The viscous drag at the plate diminishes (and increases) with the increase of the strength of the applied magnetic field (and <span>\\(R\\)</span> and <span>\\(Kc\\)</span>). The rate of increment of skin friction with respect to time is more for the case of periodic oscillating plate movement. The magnitude of viscous drag is reported as more significant for the constant case compared to the ramped case.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"33 3","pages":"598 - 621"},"PeriodicalIF":1.3000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Unsteady MHD Free Convection in a Radiating Fluid Flow past a Vertically Time-Dependent Moving Plate with Ramped Double-Diffusive Condition\",\"authors\":\"H. K. Mandal,&nbsp;D. K. Maiti,&nbsp;R. N. Jana\",\"doi\":\"10.1134/S1810232824030135\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>An unsteady MHD-free convection heat-mass transfer from a viscous, incompressible fluid flow past an infinite vertical moving plate is studied here. The fluid is considered to be electrically conducting and chemically reacting. We consider three types of plate movements: uniform velocity, uniform acceleration, and periodic acceleration. Ramped as well as constant conditions at the plate for both temperature and concentration are considered. We obtain the exact solutions of the governing equations using the method of the Laplace transform technique. The impact of the type of thermal and concentration boundary condition (constant/ramped) at the plate as well as the kind of plate movement on the flow, heat and mass transfer characteristics, are presented and analyzed here. While doing so, we also consider the variation of our governing parameters: thermal and solutal Grashof numbers, magnetic field intensity, radiation (<span>\\\\(R\\\\)</span>), chemical reaction (<span>\\\\(Kc\\\\)</span>), Prandtl number and Schmidt numbers. It is observed that the presence of buoyancy and other forces close to the plate can be almost nullified due to the imposition of a strong transverse magnetic field. The viscous drag at the plate diminishes (and increases) with the increase of the strength of the applied magnetic field (and <span>\\\\(R\\\\)</span> and <span>\\\\(Kc\\\\)</span>). The rate of increment of skin friction with respect to time is more for the case of periodic oscillating plate movement. The magnitude of viscous drag is reported as more significant for the constant case compared to the ramped case.</p>\",\"PeriodicalId\":627,\"journal\":{\"name\":\"Journal of Engineering Thermophysics\",\"volume\":\"33 3\",\"pages\":\"598 - 621\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-09-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Engineering Thermophysics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1810232824030135\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S1810232824030135","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0

摘要

摘要 本文研究了粘性不可压缩流体流过无限垂直移动板的非稳态 MHD 自由对流热质传递。流体被认为是导电和化学反应的。我们考虑了三种类型的板运动:匀速、匀加速和周期加速。考虑了板上温度和浓度的斜坡和恒定条件。我们使用拉普拉斯变换技术方法获得了控制方程的精确解。这里介绍并分析了板上热边界条件和浓度边界条件的类型(恒定/斜坡)以及板的运动类型对流动、传热和传质特性的影响。在分析过程中,我们还考虑了以下控制参数的变化:热和溶质格拉肖夫数、磁场强度、辐射(R)、化学反应(Kc)、普朗特数和施密特数。据观察,由于强横向磁场的存在,靠近板的浮力和其他力几乎可以被抵消。板上的粘性阻力随着外加磁场强度(以及 R 和 Kc)的增加而减小(或增加)。对于周期性摆动的平板运动,表皮摩擦力随时间的增加率更大。据报告,在恒定情况下,粘滞阻力的大小比在斜坡情况下更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Unsteady MHD Free Convection in a Radiating Fluid Flow past a Vertically Time-Dependent Moving Plate with Ramped Double-Diffusive Condition

Unsteady MHD Free Convection in a Radiating Fluid Flow past a Vertically Time-Dependent Moving Plate with Ramped Double-Diffusive Condition

Unsteady MHD Free Convection in a Radiating Fluid Flow past a Vertically Time-Dependent Moving Plate with Ramped Double-Diffusive Condition

An unsteady MHD-free convection heat-mass transfer from a viscous, incompressible fluid flow past an infinite vertical moving plate is studied here. The fluid is considered to be electrically conducting and chemically reacting. We consider three types of plate movements: uniform velocity, uniform acceleration, and periodic acceleration. Ramped as well as constant conditions at the plate for both temperature and concentration are considered. We obtain the exact solutions of the governing equations using the method of the Laplace transform technique. The impact of the type of thermal and concentration boundary condition (constant/ramped) at the plate as well as the kind of plate movement on the flow, heat and mass transfer characteristics, are presented and analyzed here. While doing so, we also consider the variation of our governing parameters: thermal and solutal Grashof numbers, magnetic field intensity, radiation (\(R\)), chemical reaction (\(Kc\)), Prandtl number and Schmidt numbers. It is observed that the presence of buoyancy and other forces close to the plate can be almost nullified due to the imposition of a strong transverse magnetic field. The viscous drag at the plate diminishes (and increases) with the increase of the strength of the applied magnetic field (and \(R\) and \(Kc\)). The rate of increment of skin friction with respect to time is more for the case of periodic oscillating plate movement. The magnitude of viscous drag is reported as more significant for the constant case compared to the ramped case.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of Engineering Thermophysics
Journal of Engineering Thermophysics THERMODYNAMICS-ENGINEERING, MECHANICAL
CiteScore
2.30
自引率
12.50%
发文量
0
审稿时长
3 months
期刊介绍: Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信