旋转对卡森纳米流体饱和Hele-Shaw细胞热不稳定性的影响

IF 2.6 4区 物理与天体物理 Q2 PHYSICS, APPLIED
None Ismail, B. S. Bhadauria, Anurag Srivastava
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引用次数: 0

摘要

本文采用线性和非线性两种方法研究了旋转对卡森纳米流体饱和Hele-Shaw细胞热不稳定性的影响。纳米流体模型包含布朗扩散和热泳扩散。在使用截断傅立叶级数方法进行非线性稳定性数值分析的同时,使用正态模态方法进行线性稳定性分析。结果都以图形方式显示。结果表明,旋转对Hele-Shaw参数和Casson参数具有双重影响,当旋转值较大时具有不稳定作用,当旋转值较小时具有稳定作用。刘易斯数和浓度瑞利数促进了系统内对流运动的发生。另一方面,旋转使系统稳定。研究了纳米颗粒的热质传递行为、纳米颗粒的浓度和流体相,利用Nusselt数,将Nusselt数作为时间的函数来评估,发现旋转、Hele-Shaw和Casson参数的变化对热质传递有重要影响。通过稳态和非稳态弱非线性分析来了解系统中的热传递。结论是,卡森纳米流体参数对稳定和不稳定的影响取决于旋转速率,因此这项工作可能在需要散热和保温的地方都得到利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of rotation on thermal instability under Hele-Shaw cell saturated by Casson nanofluid
This paper examines the effect of rotation on thermal instability under Hele-Shaw cell saturated by Casson nanofluid using both linear and nonlinear ways. The nanofluid model incorporates Brownian and thermophoresis diffusion. While conducting an analysis of nonlinear stability numerically using the truncated Fourier series method, analysis of linear stability is performed analytically using the normal mode methodology. The outcomes are all displayed graphically. The results demonstrate that the rotation has dual effect on Hele-Shaw parameter as well as Casson parameter, for higher value of rotation it has destabilizing effect and it stabilizing the system for lower values of rotation. Lewis number and concentration Rayleigh number promote the onset of convective motion within the system. On the other hand, rotation stabilize the system. Understanding the behavior of heat and mass transportation, the concentration of nanoparticles and fluid phase, utilize the Nusselt number when Nusselt numbers are assessed as a function of time, it is found that the variation of the rotation, Hele-Shaw and Casson parameter has a major influence on the heat and mass transfer. Both steady and unsteady weakly nonlinear analyses are performed to understand the heat transport in the system. It is concluded that the Casson nanofluid parameter has both stabilizing and destabilizing impact depending upon the rate of rotation and therefore this work can be possibly utilized in both places, where heat removal and heat conservation are required.
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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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