速度和热壁滑移对指数拉伸弹状物体边界层流动的数值分析

IF 2.7 Q3 NANOSCIENCE & NANOTECHNOLOGY Journal of Nanofluids Pub Date : 2023-06-01 DOI:10.1166/jon.2023.2041
M. Ali, M. A. Alim
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引用次数: 0

摘要

考虑了二维轴对称不可压缩流在指数拉伸弹形表面上的流动。目前的工作主要集中在多卡瓦作用下的流体流动。利用辅助相似变换将控制偏微分方程和辅助边界条件转化为高阶方程。然后通过谱拟线性化(SQLM)方法将这些高阶ode转换成一阶lde系统。通过SQLM验证了该方案的有效性、准确性和收敛性。对于上述参数,流体速度、温度、表面摩擦系数和努塞尔数已用图形表示,速度梯度的数值和努塞尔数也用表格表示。数值研究表明,磁、热滑移和普朗特数等参数对速度梯度有增强作用,而其他参数对速度梯度有相反的影响。磁、多滑移、喷射、粘滞耗散等参数均能降低换热速率,而吸力和产热对换热速率有相反的影响。由于当前问题的有效性和准确性,本工作的结果得到了证明。由于牛顿流体在工程和工业中的广泛应用,没有人尝试对具有双滑移效应和指数拉伸弹状表面的MHD流体进行检测。此外,当前的工作对那些受传热过程和期望产品质量高度影响的系统直接感兴趣。
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Numerical Analysis of Velocity and Thermal Wall Slip Effects on the Boundary Layer Flow Over an Exponentially Stretching Bullet-Shaped Object in Presence of Suction and Injection
A steady two-dimensional axisymmetric incompressible flow over an exponentially stretching bullet-shaped surface has been considered. The present work is mainly focused on fluid flow by the effect of multiple slips. The governing partial differential equations and auxiliary boundary conditions have been converted into higher-order equations by using assisting similarity transformations. These higher-order ODEs are then transformed into a 1st-order system of LDEs by the method of spectral quasi-linearization (SQLM). The validity, accuracy, and convergence of the solution have been performed by using SQLM. The fluid velocity, temperature, skin friction coefficient, and Nusselt number have been depicted graphically for the mentioned parameters as also the numerical values of velocity gradient, and Nusselt number in a table. The numerical investigation shows that the velocity gradient enhances due to the parameter of magnetic, thermal slip, and Prandtl number whereas the remaining parameters have a reverse effect on it. The heat transfer rate reduces for the parameters of magnetic, multiple slip, injection, and viscous dissipation but suction and heat generation have a reverse effect on it. The results of in this work have been justified due to the validity and accuracy of the present problem. Due to the endless application of Newtonian fluids in engineering and industry, no attempt has been taken to inspect the MHD flow with a dual slip effect along with exponential stretching bullet-shaped surface. Also, the current work is of immediate interest to those systems that are highly influenced by the heat transfer process and desired product quality.
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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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