斜磁场、热泳动和布朗运动对具有绝热壁和热狭缝的矩形多孔封闭体中混合对流导电纳米流体流动的影响计算

IF 2.6 4区 物理与天体物理 Q2 PHYSICS, APPLIED
A. Sumithra, R. Sivaraj, V. Ramachandra Prasad, O. Anwar Bég, Ho-Hon Leung, Firuz Kamalov, S. Kuharat, B. Rushi Kumar
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引用次数: 0

摘要

这一分析从理论上研究了在充满导电纳米流体的可渗透介质饱和的矩形封闭体中混合对流流的输运现象。考虑了倾斜磁场。Buongiorno的模型被用来表征纳米液体。外壳有绝热壁和热缝。在外壳的上下壁保持均匀的冷温度。围墙的垂直墙壁在墙壁的中心有热缝,是隔热的。这种对外壳中混合对流、导电纳米流体流动的分析在智能纳米材料处理系统和混合电磁纳米液体燃料电池中得到了应用。采用标记-单元法求解受拟合边界条件约束的变换后的无量纲控制方程组。考察了关键物理参数对流线、等温线、等浓度等高线和传热率的影响。模拟结果表明,理查德森数对矩形封闭体内纳米流体的热溶质特性有重要影响。磁场和浮力比参数的变化对等浓度和等温线有显著影响。达西数值的增加有增大局部换热速率的趋势。较高的Grashof数值会降低局部努塞尔数分布。孔隙参数对流线、等温线和等浓度的影响显著。因此,多孔介质可以显著地控制外壳内的输运现象。浓度、温度和速度等高线受到格拉什夫数变化的强烈影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Computation of inclined magnetic field, thermophoresis and Brownian motion effects on mixed convective electroconductive nanofluid flow in a rectangular porous enclosure with adiabatic walls and hot slits
This analysis theoretically investigates the transport phenomena of mixed convection flows in an enclosure of rectangular geometry saturated with a permeable medium filled with an electrically conducting nanofluid. An inclined magnetic field is taken into consideration. Buongiorno’s model is utilized to characterize the nanoliquid. The enclosure has adiabatic walls and hot slits. A uniform cold temperature is maintained at the enclosure’s lower and upper walls. The enclosure’s vertical walls are thermally insulated with hot slits at the center of the walls. This kind of analysis on mixed convective, electrically conducting nanofluid flows in enclosures finds applications in smart nanomaterial processing systems and hybrid electromagnetic nanoliquid fuel cells. The Marker-And-Cell (MAC) method is utilized to solve the transformed nondimension system of governing equations subject to the fitted boundary conditions. The effects of key physical parameters on streamlines, isotherms, iso-concentration contour plots and the heat transmission rate are examined. The simulations demonstrate that the Richardson number has a predominant impact on the thermo-solutal features of nanofluid flow in the rectangular enclosure. Variations in magnetic field and buoyancy ratio parameters exert a notable influence on the iso-concentrations and isotherms. An increase in the Darcy number values exhibits a tendency to magnify the local heat transfer rate. Higher Grashof number values reduce the local Nusselt number profiles. The effect of porous parameter is significant in the streamlines, isotherms and iso-concentrations. Thus, the porous medium can significantly control the transport phenomena in the enclosure. The concentration, temperature and velocity contours are strongly modified by the variations in the Grashof number.
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来源期刊
International Journal of Modern Physics B
International Journal of Modern Physics B 物理-物理:凝聚态物理
CiteScore
3.70
自引率
11.80%
发文量
417
审稿时长
3.1 months
期刊介绍: Launched in 1987, the International Journal of Modern Physics B covers the most important aspects and the latest developments in Condensed Matter Physics, Statistical Physics, as well as Atomic, Molecular and Optical Physics. A strong emphasis is placed on topics of current interest, such as cold atoms and molecules, new topological materials and phases, and novel low dimensional materials. One unique feature of this journal is its review section which contains articles with permanent research value besides the state-of-the-art research work in the relevant subject areas.
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