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Radiative MHD flow of hybrid nanofluid past a porous stretching cylinder for heat transfer enhancement

机译：杂交纳米流体的辐射MHD流过多孔拉伸缸，用于传热增强

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摘要

The current study investigates heat transfer enhancement due to the radiative magnetohydrodynamics (MHD) flow of a hybrid nanofluid [(Cu + Al_2O_3)/ (CH_2OH)_2] past a porous stretching cylinder under the influence of variable viscosity as well as suction. The nonlinear partial differential equations governing the proposed physical model are transformed into nonlinear ordinary differential equations by applying suitable similarity transformation. The scaled-down system is solved numerically by the fourth-order Runge-Kutta method along with shooting technique for the achievement of asymptotic boundary condition. The velocity and temperature profiles are obtained for various physical factors of the problem, namely, magnetic interaction factor (M), Reynolds number (Re), volume fraction factor of copper (Φ_2), variable viscosity (δ), and radiation factor (R_d), together with suction (γ), by fixing the Prandtl number of the core fluid (ethylene glycol) constant at 25.825. The numerical values of skin friction and the rate of heat transfer are obtained and tabulated. To validate the proposed physical model, numerical simulations are provided with comparison. The paper highlights the effects of physical factors, namely, radiation, variable viscosity, and suction parameters, on the flow of a hybrid nanoflluid for heat transfer enhancement.
机译：目前的研究通过杂交纳米流体[（Cu + Al_2O_3）/（CH_2OH）/（CH_2OH）/（CH_2OH）/（CH_2OH）/（CH_2OH）/（CH_2OH）/（CH_2OH）/（CH_2OH）_2的流动在可变粘度以及抽吸的影响下进行多孔拉伸缸的流动增强。通过施加合适的相似性转化，控制所提出的物理模型的非线性偏微分方程被转变为非线性常分方程。缩小系统由四阶runge-kutta方法数字上以数字方式解决，以及实现渐近边界条件的拍摄技术。对于问题的各种物理因素，即磁性相互作用因子（m），雷诺数（Re），铜（φ_2）的体积分数因子，可变粘度（δ）和辐射系数（R_D）的各种物理因素），通过在25.825处固定核心流体（乙二醇）常数的PRANDTL数量来加入抽吸（γ）。获得皮肤摩擦的数值和传热速率。为了验证所提出的物理模型，将提供数值模拟进行比较。本文突出了物理因素，即辐射，可变粘度和吸入参数的影响，对热传递增强的杂化纳米酮的流动。

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