{"title":"在Soret和Dufour效应下,弹性-粘性MHD流体在以振荡多孔板为界的多孔介质中滑移流动的传热传质","authors":"Debasish Dey, Annwesha Borthakur","doi":"10.1002/htj.23187","DOIUrl":null,"url":null,"abstract":"<p>In this work, we investigate the heat and mass transfer of elastico-viscous magnetohydrodynamic fluid (Walter's <span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mi>B</mi>\n \n <mo>'</mo>\n </mrow>\n </mrow>\n <annotation> $B\\text{'}$</annotation>\n </semantics></math> model) flow through a porous medium bounded by an oscillating porous plate in a slip-flow regime subjected to a uniform transverse magnetic field. The primary objective of this study is to examine the flow under forced convection, incorporating diffusion-thermo and thermo-diffusion effects, which represents the novelty of this research. The governing equations of the flow are solved numerically using a regular perturbation method for small <span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mi>ϵ</mi>\n \n <mo>></mo>\n \n <mn>0</mn>\n </mrow>\n </mrow>\n <annotation> $\\epsilon \\gt 0$</annotation>\n </semantics></math>. With practically feasible parameter values, numerical simulations are conducted to demonstrate the effects of associated parameters on the flow dynamics. Velocity, temperature, and concentration profiles are presented graphically for varying parameters, and skin friction (<span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <msub>\n <mi>C</mi>\n \n <mi>f</mi>\n </msub>\n </mrow>\n </mrow>\n <annotation> ${C}_{f}$</annotation>\n </semantics></math>), Nusselt number (<span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mi>N</mi>\n \n <mi>u</mi>\n </mrow>\n </mrow>\n <annotation> $Nu$</annotation>\n </semantics></math>), and Sherwood number (<span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mi>S</mi>\n \n <mi>h</mi>\n </mrow>\n </mrow>\n <annotation> $Sh$</annotation>\n </semantics></math>) are computed. It is observed that increasing the diffusion-thermo effect reduces the thickness of the thermal boundary layer. Furthermore, a nonlinear relationship is observed between the thermal- diffusion effect and the concentration distribution of the flow field.</p>","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"54 1","pages":"646-669"},"PeriodicalIF":2.8000,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Heat and mass transfer of elastico-viscous MHD fluid flow through a porous medium bounded by an oscillating porous plate in slip-flow regime under Soret and Dufour effects\",\"authors\":\"Debasish Dey, Annwesha Borthakur\",\"doi\":\"10.1002/htj.23187\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this work, we investigate the heat and mass transfer of elastico-viscous magnetohydrodynamic fluid (Walter's <span></span><math>\\n <semantics>\\n <mrow>\\n \\n <mrow>\\n <mi>B</mi>\\n \\n <mo>'</mo>\\n </mrow>\\n </mrow>\\n <annotation> $B\\\\text{'}$</annotation>\\n </semantics></math> model) flow through a porous medium bounded by an oscillating porous plate in a slip-flow regime subjected to a uniform transverse magnetic field. The primary objective of this study is to examine the flow under forced convection, incorporating diffusion-thermo and thermo-diffusion effects, which represents the novelty of this research. The governing equations of the flow are solved numerically using a regular perturbation method for small <span></span><math>\\n <semantics>\\n <mrow>\\n \\n <mrow>\\n <mi>ϵ</mi>\\n \\n <mo>></mo>\\n \\n <mn>0</mn>\\n </mrow>\\n </mrow>\\n <annotation> $\\\\epsilon \\\\gt 0$</annotation>\\n </semantics></math>. With practically feasible parameter values, numerical simulations are conducted to demonstrate the effects of associated parameters on the flow dynamics. Velocity, temperature, and concentration profiles are presented graphically for varying parameters, and skin friction (<span></span><math>\\n <semantics>\\n <mrow>\\n \\n <mrow>\\n <msub>\\n <mi>C</mi>\\n \\n <mi>f</mi>\\n </msub>\\n </mrow>\\n </mrow>\\n <annotation> ${C}_{f}$</annotation>\\n </semantics></math>), Nusselt number (<span></span><math>\\n <semantics>\\n <mrow>\\n \\n <mrow>\\n <mi>N</mi>\\n \\n <mi>u</mi>\\n </mrow>\\n </mrow>\\n <annotation> $Nu$</annotation>\\n </semantics></math>), and Sherwood number (<span></span><math>\\n <semantics>\\n <mrow>\\n \\n <mrow>\\n <mi>S</mi>\\n \\n <mi>h</mi>\\n </mrow>\\n </mrow>\\n <annotation> $Sh$</annotation>\\n </semantics></math>) are computed. It is observed that increasing the diffusion-thermo effect reduces the thickness of the thermal boundary layer. Furthermore, a nonlinear relationship is observed between the thermal- diffusion effect and the concentration distribution of the flow field.</p>\",\"PeriodicalId\":44939,\"journal\":{\"name\":\"Heat Transfer\",\"volume\":\"54 1\",\"pages\":\"646-669\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Heat Transfer\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/htj.23187\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"THERMODYNAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Heat Transfer","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/htj.23187","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"THERMODYNAMICS","Score":null,"Total":0}
引用次数: 0
摘要
在这项工作中,我们研究了弹性-粘性磁流体动力学流体(Walter's B ' $B\text{'}$模型)在均匀横向磁场作用下以滑移流形式流过以振荡多孔板为界的多孔介质的传热和传质。本研究的主要目的是研究强迫对流下的流动,结合扩散-热效应和热-扩散效应,这是本研究的新颖之处。流动的控制方程采用小的正则摄动法进行数值求解;0$ \epsilon \gt 0$。采用实际可行的参数值,进行了数值模拟,验证了相关参数对流动动力学的影响。速度、温度和浓度曲线以图形的形式显示了不同参数和表面摩擦(C f ${C}_{f}$)。计算了努塞尔数(Nu$ Nu$)和舍伍德数(Sh$ Sh$)。结果表明,扩散热效应的增大减小了热边界层的厚度。此外,热扩散效应与流场浓度分布之间存在非线性关系。
Heat and mass transfer of elastico-viscous MHD fluid flow through a porous medium bounded by an oscillating porous plate in slip-flow regime under Soret and Dufour effects
In this work, we investigate the heat and mass transfer of elastico-viscous magnetohydrodynamic fluid (Walter's model) flow through a porous medium bounded by an oscillating porous plate in a slip-flow regime subjected to a uniform transverse magnetic field. The primary objective of this study is to examine the flow under forced convection, incorporating diffusion-thermo and thermo-diffusion effects, which represents the novelty of this research. The governing equations of the flow are solved numerically using a regular perturbation method for small . With practically feasible parameter values, numerical simulations are conducted to demonstrate the effects of associated parameters on the flow dynamics. Velocity, temperature, and concentration profiles are presented graphically for varying parameters, and skin friction (), Nusselt number (), and Sherwood number () are computed. It is observed that increasing the diffusion-thermo effect reduces the thickness of the thermal boundary layer. Furthermore, a nonlinear relationship is observed between the thermal- diffusion effect and the concentration distribution of the flow field.