| 1 | Slip flow of Maxwell viscoelasticity-based micropolar nanoparticles with porous medium: a numerical study显示文摘This article presents the mass and heat transport aspects in viscoelastic nanofluid flows under the presence of velocity slip conditions. To explore the nonNewtonian behavior, a Maxwell viscoelasticity-based micropolar is considered. Moreover, a porous medium saturates the stretching sheet. A set of similarity variables is introduced to derive the dimensionless ordinary differential equations of velocity, concentration, and temperature profiles. The numerical solution is computed by using the MATLAB bvp4c package. The salient flow features of velocity, concentration, and temperature profiles are described and discussed through various graphs. It is observed that with an increase in the slip parameter, the micro-rotation velocity also increases. The temperature of nanoparticles gets maximum values by varying the viscoelastic parameter and the porosity parameter while an opposite trend is noted for the micro-rotation parameter. The local Nusselt number and the local Sherwood number increase by increasing the viscoelastic parameter, the porosity parameter, and the slip velocity parameter. The graphical computation is performed for a specified range of parameters, such as 0 ≤ M ≤ 2.5, 0 ≤σm ≤ 2.5, 0 ≤ K1 ≤ 1.5, 0.5 ≤ Pr ≤ 3.0, 0 ≤σ≤ 1.5, 0.5 ≤ Sc ≤ 2.0, 0.2 ≤ Nb ≤ 0.8, and 0.2 ≤ Nt ≤ 0.8. | H. WAQAS M. IMRAN S. U. KHAN S. A. SHEHZAD M. A. MERAJ | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，9： | 3 |
| 2 | Williamson流体在黏性耗散和均匀磁场作用下四次自催化化学反应的熵优化(英文)显示文摘阐述了可伸缩的旋转盘对非牛顿磁流体动力学(MHD)的影响。两个圆盘以不同的角速度和不同的伸缩率旋转。在能量表达式中考虑黏性耗散,利用热力学第二定律分析熵的生成,文中首次介绍了熵产生的化学过程(多相和均相)。采用边界层方法建立模型,引入变量对控制系统进行无量纲化。通过高度非线性表达式的计算,得到同伦过程解的收敛性。用图解法描述了各种因素对热场、速度场和溶质场的影响特征。此外,以表格形式给出了工程质量包括表面摩擦系数、Nusselt数的计算结果。结果证实了因Weissenberg(We)(韦斯森伯格)和Eckert(Ec)(埃克特)数而导致的温度梯度分布的增加。 | M. IJAZ KHAN Sania JAVED Tasawar HAYAT M. WAQAS Ahmed ALSAEDI | 2019 | Journal of Central South University2019，26，5： | 1 |
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