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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Effects of two-phase nanofluid model on convection in a double lid-driven cavity in the presence of a magnetic field
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Effects of two-phase nanofluid model on convection in a double lid-driven cavity in the presence of a magnetic field

机译：磁场存在下两相纳米流体模型对双盖驱动腔内对流的影响

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Purpose The aim of this study is to investigate the effects of two-phase nanofluid model on mixed convection in a double lid-driven square cavity in the presence of a magnetic field. The authors believe that this work is a good contribution for improving the thermal performance and the heat transfer enhancement in some engineering instruments.Design/methodology/approach The current work investigates the problem of mixed convection heat transfer in a double lid-driven square cavity in the presence of magnetic field. The used cavity is filled with water-Al2O3 nanofluid based on Buongiorno's two-phase model. The bottom horizontal wall is maintained at a constant high temperature and moves to the left/right, while the top horizontal wall is maintained at a constant low temperature and moves to the right/left. The left and right vertical walls are thermally insulated. The dimensionless governing equations are solved numerically using the Galerkin weighted residual finite element method.Findings The obtained results show that the heat transfer rate enhances with an increment of Reynolds number or a reduction of Hartmann number. In addition, effects of thermophoresis and Brownian motion play a significant role in the growth of convection heat transfer.Originality/value According to above-mentioned studies and to the authors' best knowledge, there has no study reported the MHD mixed convection heat transfer in a double lid-driven cavity using the two-phase nanofluid model. Thus, the authors of the present study believe that this work is valuable. Therefore, the aim of this comprehensive numerical study is to investigate the effects of two-phase nanofluid model on mixed convection in a double lid-driven square cavity in the presence of a magnetic field. The authors believe that this work is a good contribution for improving the thermal performance and the heat transfer enhancement in some engineering instruments.
机译：目的这项研究的目的是研究在磁场作用下，两相纳米流体模型对双盖驱动方腔内混合对流的影响。作者认为这项工作对改善一些工程仪器的热性能和传热效果起到了很好的作用。设计/方法论/方法目前的工作是研究双层盖驱动方腔中对流混合对流换热问题。磁场的存在。根据Buongiorno的两相模型，用过的空腔中充满了水-Al2O3纳米流体。底部水平壁保持恒定的高温并向左/右移动，而顶部水平壁保持恒定的低温并向右/左移动。左右垂直壁是隔热的。结果表明，传热速率随雷诺数的增加或哈特曼数的减少而增加，从而使传热率提高。另外，热泳和布朗运动的影响在对流换热的增长中也起着重要作用。原始数据/值根据上述研究和笔者所知，没有研究报道MHD混合对流换热使用两相纳米流体模型的双盖驱动腔。因此，本研究的作者认为这项工作是有价值的。因此，这项全面的数值研究的目的是研究在磁场存在下，两相纳米流体模型对双盖驱动方腔内混合对流的影响。作者认为，这项工作对改善某些工程仪器的热性能和增强传热有很好的贡献。

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