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首页> 外文期刊>Journal of magnetism and magnetic materials >Interaction effects of an inclined magnetic field and nanofluid on forced convection heat transfer and flow irreversibility in a duct with an abrupt contraction
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Interaction effects of an inclined magnetic field and nanofluid on forced convection heat transfer and flow irreversibility in a duct with an abrupt contraction

机译：倾斜磁场和纳米流体对强制对流换热和管道不可逆流动的不可逆性的相互作用

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摘要

This research examines the interaction effects of an inclined magnetic field and nanofluid on forced convection heat transfer and flow irreversibility in a duct with an abrupt contraction. This contraction is created by an inclined forward facing step and is simulated using the Blocked region method. To analysis the flow irreversibility, the entropy generation number is calculated based on the second law of thermodynamics. The effects of Hartmann number (Ha = 0 - 100), magnetic field inclination angle (beta = 0((A) over cap degrees) - 90((A) over cap degrees) ) and nanoparticles volume fraction (phi = 0 - 0.06) on the values of friction coefficient, Nusselt number and entropy generation number are shown graphically. The results present that the Hartmann number and inclination angle of the magnetic field have the reverse effects on the heat transfer rate, whiles their influences on the flow irreversibility is significantly increasing. Also, total entropy generation number and average Nusselt number increase as the volume fraction of nanoparticles enhances from 0 to 0.06.
机译：这项研究研究了倾斜磁场和纳米流体对强制对流换热和管道突然收缩的流动不可逆性的相互作用。该收缩是通过倾斜的向前步骤创建的，并使用“封闭区域”方法进行了模拟。为了分析流动的不可逆性，根据热力学第二定律计算熵的产生数。哈特曼数（Ha = 0-100），磁场倾角（β= 0（（上限）上限）-90（（A上限）））和纳米粒子体积分数（phi = 0-0.06）的影响）在摩擦系数的值上，以图形方式显示Nusselt数和熵产生数。结果表明，磁场的哈特曼数和倾角对传热速率具有相反的影响，而它们对流动不可逆性的影响则显着增加。而且，随着纳米粒子的体积分数从0增加到0.06，总熵产生数和平均Nusselt数增加。

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