Manjunatha S, Ammani Kuttan B, Jayanthi S, Chamkha Ali, Gireesha B J
Department of Mathematics, Faculty of Engineering, CHRIST (Deemed to be University), Bengaluru, 560076, Karnataka, India.
Department of Mathematics, BMS College of Engineering, Bengaluru, 560019, Karnataka, India.
Heliyon. 2019 Apr 4;5(4):e01469. doi: 10.1016/j.heliyon.2019.e01469. eCollection 2019 Apr.
The aim of the current work is to explore how heat transfer can be enhanced by variations in the basic properties of fluids in the presence of free convection with the aid of suspended hybrid nanofluids. Also, the influence of the Laurentz force on the flow is considered. The mathematical equations are converted into a pair of self-similarity equations by applying appropriate transformations. The reduced similarity equivalences are then solved numerically by Runge-Kutta-Fehlberg 45-order method. To gain better perception of the problem, the flow and energy transfer characteristics are explored for distinct values of significant factors such as variable viscosity, convection, magnetic field, and volume fraction. The results acquired are in good agreement with previously published results. The noteworthy finding is that the thermal conductivity is greater in hybrid nanofluid than that of a regular nanofluid in the presence of specified factors. The boundary layer thickness of both hybrid nanofluid and normal nanofluid diminishes due to decrease in variable viscosity. The fluid flow and temperature of the hybrid nanofluid and normal nanofluid increases as there is a rise in volume fraction.
当前工作的目的是探索在悬浮混合纳米流体存在的情况下，通过自由对流中流体基本性质的变化如何增强热传递。此外，还考虑了洛伦兹力对流动的影响。通过应用适当的变换，将数学方程转化为一对自相似方程。然后用龙格 - 库塔 - 费尔贝格45阶方法对简化后的相似方程进行数值求解。为了更好地理解该问题，针对可变粘度、对流、磁场和体积分数等重要因素的不同值，研究了流动和能量传递特性。所获得的结果与先前发表的结果吻合良好。值得注意的发现是，在特定因素存在的情况下，混合纳米流体的热导率高于常规纳米流体。由于可变粘度的降低，混合纳米流体和普通纳米流体的边界层厚度均减小。随着体积分数的增加，混合纳米流体和普通纳米流体的流体流动和温度升高。
