Purpose

The purpose of this study is to apply an incompressible smoothed particle hydrodynamics (ISPH) method to simulate the Magnetohydrodynamic (MHD) free convection flow of a nanofluid in a porous cavity containing rotating hexagonal and two circular cylinders under the impacts of Soret and Dufour numbers.

Design/methodology/approach

The inner shapes are rotating around a cavity center by a uniform circular motion at angular rate ω. An inner hexagonal shape has higher temperature T_h and concentration C_h than the inner two circular cylinders in which the temperature is T_c and concentration is C_c. The performed numerical simulations are presented in terms of the streamlines, isotherms and isoconcentration as well as the profiles of average Nusselt and Sherwood numbers.

Findings

The results indicated that the uniform motions of inner shapes are changing the characteristics of the fluid flow, temperature and concentration inside a cavity. An augmentation on a Hartman parameter slows down the flow speed and an inclination angle of a magnetic field raises the flow speed. A rise in the Soret number accompanied by a reduction in the Dufour number lead to a growth in the concentration distribution in a cavity.

Originality/value

ISPH method is used to simulate the double-diffusive convection of novel rotating shapes in a porous cavity. The inner novel shapes are rotating hexagonal and two circular cylinders.

中文翻译：

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纳米流体在包含旋转六边形和圆柱体的多孔腔中的双扩散对流：ISPH 模拟

目的

本研究的目的是应用不可压缩的光滑粒子流体动力学 (ISPH) 方法来模拟纳米流体在包含旋转六边形和两个圆柱体的多孔腔中在 Soret 和 Dufour 数的影响下的磁流体力学 (MHD) 自由对流流动。

设计/方法/方法

内部形状围绕型腔中心以角速率匀速圆周运动旋转 ω. 内六边形的温度T _h和浓度C _h比温度T _c和浓度C _c的内部两个圆柱体具有更高的温度T _h和浓度C _h。所执行的数值模拟以流线、等温线和等浓度以及平均 Nusselt 和 Sherwood 数的轮廓呈现。

发现

结果表明，内部形状的匀速运动正在改变腔内流体流动、温度和浓度的特性。Hartman 参数的增加会减慢流速，而磁场的倾角会提高流速。Soret 数的增加伴随 Dufour 数的减少导致腔中浓度分布的增加。

原创性/价值

ISPH 方法用于模拟多孔腔中新型旋转形状的双扩散对流。内部新颖的形状是旋转六边形和两个圆柱体。