{"title":"存在布朗运动和热泳时霍尔电流和扩散热影响的混合对流 MHD 流的传热和传质特性","authors":"Bingi Suneetha, Ramachandra Reddy Vaddemani, Damodara Reddy Annapureddy, Giulio Lorenzini","doi":"10.37934/arfmts.115.1.5168","DOIUrl":null,"url":null,"abstract":"This study investigates the influence of Hall current diffusion, thermo-activation energy, and other parameters on the flow characteristics of an electrically conducting Jeffrey nanofluid. The Jeffrey nanofluid flow occurs across a continually expanding surface, and additional factors like thermal radiation, heat generation/absorption, and inclined plates are included in the analysis. A vertically installed transverse magnetic field is assumed to have a modest Reynolds number. The controlling partial differential equations are transformed into nonlinear ordinary differential equations using appropriate similarity transformations. These equations are then numerically solved using the Matlab bvp4c module. 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引用次数: 0
摘要
本研究探讨了霍尔电流扩散、热激活能量和其他参数对导电杰弗里纳米流体流动特性的影响。杰弗里纳米流体流过一个持续膨胀的表面,热辐射、发热/吸热和倾斜板等其他因素也被纳入分析。假定垂直安装的横向磁场具有适度的雷诺数。利用适当的相似变换将控制偏微分方程转换为非线性常微分方程。然后使用 Matlab bvp4c 模块对这些方程进行数值求解。本研究旨在分析霍尔电流系数、热辐射系数、热源/散热系数、布朗运动系数、热泳参数和磁化率等多种因素对速度、浓度和温度的影响。为此,如前所述,将使用图形表示法来直观显示和讨论这些影响。为了更深入地了解新出现参数的内部动态,将进行数值计算,以确定沿 x 轴和 z 轴的局部努塞尔特数、舍伍德数和表皮摩擦系数。研究结果表明,随着线性和非线性热辐射成分的增加,流速呈下降趋势。此外,布朗运动参数值的增加将导致纳米粒子浓度曲线的降低。
Heat and Mass Transfer Characteristics of Mixed Convection MHD Flow with the Impacts of Hall Current and Diffusion Thermo in the Presence of Brownian Motion and Thermophoresis
This study investigates the influence of Hall current diffusion, thermo-activation energy, and other parameters on the flow characteristics of an electrically conducting Jeffrey nanofluid. The Jeffrey nanofluid flow occurs across a continually expanding surface, and additional factors like thermal radiation, heat generation/absorption, and inclined plates are included in the analysis. A vertically installed transverse magnetic field is assumed to have a modest Reynolds number. The controlling partial differential equations are transformed into nonlinear ordinary differential equations using appropriate similarity transformations. These equations are then numerically solved using the Matlab bvp4c module. This study aims to analyze the impact of many factors, including the Hall current factor, the thermal radiation factor, the heat source/sink factor, the Brownian motion factor, the thermophoresis parameter, and the magnetization, on the velocity, concentration, and temperature. To do this, graphical representations will be used as a means of visualizing and discussing the impacts, as mentioned earlier. To get a deeper understanding of the internal dynamics of the emerging parameters, a numerical computation is conducted to determine the local Nusselt number, Sherwood number, and skin friction coefficient along the x and z axes. Research findings have shown that the flow velocity exhibits a decreasing trend as the linear and nonlinear thermal radiation components rise. Furthermore, augmenting the values of the Brownian motion parameter will lead to a reduction in the concentration profile of the nanoparticle.
期刊介绍:
This journal welcomes high-quality original contributions on experimental, computational, and physical aspects of fluid mechanics and thermal sciences relevant to engineering or the environment, multiphase and microscale flows, microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.