Impact of nanoparticle shape on thermo-solutal buoyancy induced lid-driven-cavity with inclined magnetic-field

IF 5.4 2区工程技术 Q1 ENGINEERING, AEROSPACE

Propulsion and Power Research Pub Date : 2022-03-01 DOI:10.1016/j.jppr.2022.01.002

Ratnadeep Nath, Krishnan Murugesan

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引用次数: 2

Abstract

The aim of this paper is to numerically investigate the influence of nanoparticles shape on heat and mass transport phenomena in a moving lid cavity under the combined effect of thermo-solutal buoyancy force and magnetic force. The governing equations are transformed into velocity-vorticity form of equations and solved using Galerkin's weighted residual finite-element-technique. The analysis has been carried out with parameters like buoyancy ratio (−5 ≤ N ≤ 5), magnetic field inclination angle (0° ≤ ϕ ≤ 90°) with four shapes of Al₂O₃ nanoparticle like bricks, blades, platelets and cylinders. The results revealed that the shape factor on Nusselt number is significant depending upon the inclined magnetic field and buoyancy ratio whereas on mass transfer the shape effect is negligible. The diffusion mode of transport process is stronger than the convection mode at higher inclination angle of magnetic field. Based on a given value of N and ϕ, blade and cylinder shows the best performance in Nusselt and Sherwood number respectively except the platelet shape that shows maximum frictional loss in terms of wall shear stress.

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倾斜磁场下纳米颗粒形状对热溶质浮力诱导的盖驱动腔的影响

本文的目的是数值研究在热溶质浮力和磁力共同作用下，纳米颗粒形状对运动盖腔内热质输运现象的影响。将控制方程转化为速度涡量型方程，采用伽辽金加权残差有限元技术求解。采用砖状、叶片状、片状、圆柱形四种Al2O3纳米颗粒，以浮力比(- 5≤N≤5)、磁场倾角(0°≤φ≤90°)等参数进行分析。结果表明，形状因子对努塞尔数的影响取决于倾斜磁场和浮力比，而对传质的影响可以忽略不计。在较大的磁场倾角下，输运过程的扩散模式强于对流模式。在给定N和φ值的情况下，除了血小板形状在壁面剪应力方面的摩擦损失最大外，叶片和圆柱体在努塞尔数和舍伍德数上表现最好。

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来源期刊

Propulsion and Power Research Multiple-

CiteScore

7.50

自引率

5.70%

发文量

期刊介绍： Propulsion and Power Research is a peer reviewed scientific journal in English established in 2012. The Journals publishes high quality original research articles and general reviews in fundamental research aspects of aeronautics/astronautics propulsion and power engineering, including, but not limited to, system, fluid mechanics, heat transfer, combustion, vibration and acoustics, solid mechanics and dynamics, control and so on. The journal serves as a platform for academic exchange by experts, scholars and researchers in these fields.