具有速度滑移和粘性耗散的多孔倾斜拉伸表面上非定常磁流体力学纳米流体流动的熵产生

IF 2.7 Q3 NANOSCIENCE & NANOTECHNOLOGY Journal of Nanofluids Pub Date : 2023-06-01 DOI:10.1166/jon.2023.2025
Folarin Oluwaseun, S. Goqo, Hiranmoy Mondal
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引用次数: 0

摘要

本文对倾斜变磁场、速度滑移、热辐射和粘性耗散对多孔介质中倾斜拉伸片上非定常MHD纳米流体流动熵产生的影响进行了数值研究。用SQLM求解经过适当相似变换后得到的无量纲非线性控制常微分方程。数值分析了模型中重要因素对流动特性的影响,并用表格和图表详细讨论了这些影响。计算了表面摩擦的重要物理量、努塞尔数和局部舍伍德数,并在表中进行了说明。发现0°至90°之间的可变磁场的排列角度通过Bejan数显著影响流体流速、温度、质量通量和熵的产生。速度滑移对质量流量没有显著影响,但对流体流速和温度有显著影响。拉伸片的倾斜度和介质的孔隙率也会影响流体的流速、温度和质量流量。
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Entropy Generation of Unsteady Magnetohydrodynamics Nanofluid Flow Over a Porous Inclined Stretching Surface with Velocity Slip and Viscous Dissipation
The numerical investigation of the effects of inclined variable magnetic field, velocity slip, thermal radiation and viscous dissipation on the entropy generation of an unsteady MHD nanofluid flow over an inclined stretching sheet in a porous medium has been carried out here. The non-dimensional non-linear governing ordinary differential equations obtained after suitable similarity transformations are solved by SQLM. Effects of important factors of the model on the flow characteristics were numerically analysed and discussed in details with tables and graphs. Important physical quantities of skin friction, Nusselt number and the local Sherwood number were calculated and illustrated on tables. The aligned angle of the variable magnetic field between 0° and 90° was found to significantly influence the fluid flow rate, temperature, mass flux and entropy generation through the Bejan number. The velocity slip slip was found to have no signicant effects on the mass flux, however it influenced significantly the fluid flow rate and temperature. The inclination of the stretching sheet and the porosity of the medium were also found to influence the fluid flow rate, temperature and mass flux.
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来源期刊
Journal of Nanofluids
Journal of Nanofluids NANOSCIENCE & NANOTECHNOLOGY-
自引率
14.60%
发文量
89
期刊介绍: Journal of Nanofluids (JON) is an international multidisciplinary peer-reviewed journal covering a wide range of research topics in the field of nanofluids and fluid science. It is an ideal and unique reference source for scientists and engineers working in this important and emerging research field of science, engineering and technology. The journal publishes full research papers, review articles with author''s photo and short biography, and communications of important new findings encompassing the fundamental and applied research in all aspects of science and engineering of nanofluids and fluid science related developing technologies.
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