热辐射、粘性耗散和焦耳热对麦克斯韦混合纳米流体在具有耦合应力效应的指数拉伸片上的熵生成和流动的影响

IF 2.3 4区 工程技术 Q2 ENGINEERING, MECHANICAL
Gandrakota Kathyayani, Poojari Prakash Gowd
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引用次数: 0

摘要

本研究采用数值技术,探讨了麦克斯韦混合纳米流体在指数级拉伸薄片上的流动和热问题。分析结合了热辐射、粘性耗散、焦耳热和化学反应的影响。我们使用 MATLAB 内置的 bvp4c 函数,在将治理方程转换为常微分方程后,成功地求解了这些方程。这项工作的关键新颖之处在于采用了麦克斯韦混合纳米流体(一种比传统纳米流体或普通麦克斯韦流体更为复杂的流体),并进行了多方面的分析,在考虑流动和传热的同时,还考虑了耦合应力、化学反应和熵生成优化等因素。研究结果表明,麦克斯韦参数和磁场参数都会降低流体速度,原因分别是对立力和弹性增强。温度曲线随着热辐射、纳米粒子体积分数和埃克特数的增加而上升,这分别是由于辐射吸收增强、传热改善和内部热量产生所致。随着布林克曼数和纳米铜微粒体积百分比的增加,熵的产生变得更加强烈,贝扬数则由于粘性耗散和摩擦的增强而降低。在麦克斯韦参数值 0.1 和 0.7 之间,摩擦因数下降了 0.1077。代表热传导效率的努塞尔特数随埃克特数的增加而降低,但随辐射参数和纳米颗粒体积分数的增加而升高。在埃克特数为 0.1 和 0.7 之间,摩擦因数下降了 0.1077。最后,较陡的浓度梯度会导致表示传质率的舍伍德数随施密特数的增加而增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of thermal radiation, viscous dissipation, and joule heating on entropy generation and flow of a Maxwell hybrid nanofluid over an exponentially stretching sheet with couple stress effects
Using a numerical technique, this study explores the flow and thermal aspects of a Maxwell hybrid nanofluid across an exponentially stretched sheet. The analysis incorporates the effects of thermal radiation, viscous dissipation, Joule heating, and chemical reaction. We use the in-built MATLAB function bvp4c to successfully solve the governing equations after we convert them to ordinary differential equations. The key novelty of this work lies in employing the Maxwell hybrid nanofluid, a more complex fluid than traditional nanofluids or regular Maxwell fluids and conducting a multifaceted analysis that considers factors like couple stress, chemical reaction, and entropy generation optimization alongside flow and heat transfer. The findings demonstrate that the Maxwell parameter and the magnetic field parameter both reduce fluid velocity due to opposing forces and enhanced elasticity, respectively. The temperature profile exhibits a rise with increasing thermal radiation, volume fraction of nanoparticles, and Eckert number due to enhanced radiative absorption, improved heat transfer, and internal heat generation respectively. As the Brinkman number and volume percentage of copper nanoparticles increase, the entropy generation becomes more intense and the Bejan number decreases as a result of enhanced viscous dissipation and friction. Between the values of 0.1 and 0.7 for Maxwell parameter, the friction factor exhibits a decrement of 0.1077. The Nusselt number, signifying heat transfer efficiency, reduces with the Eckert number but increases with the radiation parameter and volume fraction of nanoparticles. Between the values of 0.1 and 0.7 for Eckert number, the friction factor exhibits a decrement of 0.1077. Lastly, a steeper concentration gradient causes the Sherwood number, which is an indication of the mass transmission rate, to rise with the Schmidt number. it is detected that the rate of heat transfer increases at a rate of 0.0721 when chemical reaction values lie between 0 and 1.8.
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来源期刊
CiteScore
3.80
自引率
16.70%
发文量
370
审稿时长
6 months
期刊介绍: The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.
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