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Control volume finite element method for nanofluid MHD natural convective flow inside a sinusoidal annulus under the impact of thermal radiation

机译:热辐射影响下正弦环空内纳米流体MHD自然对流的控制体积有限元方法

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Control Volume Finite Element Method (CVFEM) is a new approach in which all advantages of finite volume method and finite element method are combined together. In this research, CVFEM is employed to simulate the impact of radiative heat transfer on magnetohydrodynamic free convection of water based nanofluid. Fe3O4-H2O ferrofluid has been used and viscosity of nanofluid is variable respect to magnetic field. Roles of the radiation parameter (Rd), numbers of undulations (N), Fe3O4-water volume fraction (phi), Hartmann number (Ha) and the Rayleigh number (Ra) are depicted. Nu(ave) is present as a formula according to effect of various parameters. Results prove that the inner surface temperature decreases with the augment of buoyancy forces. Nu(ave) enhances with the augmentation of the thermal radiation parameter while it decreases with the augment of Ha and N. (C) 2018 Elsevier B.V. All rights reserved.
机译:控制体积有限元方法(CVFEM)是一种将有限体积方法和有限元方法的所有优点结合在一起的新方法。在这项研究中,CVFEM用于模拟辐射传热对水基纳米流体磁流体动力学自由对流的影响。已经使用了Fe 3 O 4 -H 2 O铁磁流体,并且纳米流体的粘度相对于磁场是可变的。描述了辐射参数(Rd),起伏数(N),Fe3O4-水体积分数(phi),哈特曼数(Ha)和瑞利数(Ra)的作用。根据各种参数的影响,Nu(ave)作为公式存在。结果证明,内表面温度随着浮力的增加而降低。 Nu(ave)随着热辐射参数的增加而增强,而随着Ha和N的增加而减小。(C)2018 Elsevier B.V.保留所有权利。

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