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首页> 外文期刊>European Physical Journal Plus >Effect of spatially variable magnetic field on ferrofluid flow and heat transfer considering constant heat flux boundary condition
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Effect of spatially variable magnetic field on ferrofluid flow and heat transfer considering constant heat flux boundary condition

机译：考虑恒定热通量边界条件的空间可变磁场对铁磁流体流动和传热的影响

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摘要

Ferrofluid flow and heat transfer in the presence of an external variable magnetic field is studied. The inner cylinder is maintained at uniform heat flux and the outer cylinder has constant temperature. The Control Volume based Finite Element Method (CVFEM) is applied to solve the governing equations. Combined magnetohydrodynamic and ferrohydrodynamic effects have been taken into account. The effects of magnetic number, Hartmann number, Rayleigh number and nanoparticle volume fraction on hydrothermal behavior have been examined. Results show that the Nusselt number is an increasing function of Magnetic number, Rayleigh number and nanoparticle volume fraction while it is a decreasing function of the Hartmann number. Also, it can be concluded that the enhancement in heat transfer decreases with an increase in the Rayleigh number and magnetic number but it increases with an increase in the Hartmann number.
机译：研究了在外部可变磁场存在下的铁磁流体流动和热传递。内筒保持恒定的热通量，外筒具有恒定的温度。应用基于控制体积的有限元方法（CVFEM）求解控制方程。已经考虑了磁流体动力和铁流体动力的综合作用。研究了磁数，哈特曼数，瑞利数和纳米粒子体积分数对水热行为的影响。结果表明，Nusselt数是磁数，瑞利数和纳米粒子体积分数的增加函数，而它是Hartmann数的减少函数。而且，可以得出结论，传热的增强随着瑞利数和磁数的增加而减少，但是随着哈特曼数的增加而增加。

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