Volume 40, Issue 2 (1-2022)
2022, 40(2): 81-94 |
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Gilavand P, Heidari H R. Numerical Study of the Effect of Nanofluid on Heat Transfer of a Channel in the Presence of Variable Magnetic Field with Obstacles. Computational Methods in Engineering 2022; 40 (2) :81-94
URL: http://jcme.iut.ac.ir/article-1-847-en.html
URL: http://jcme.iut.ac.ir/article-1-847-en.html
1- Mechanical Engineering, Azad University Doroud Branch, Doroud, Iran
2- Mechanical Engineering, Malayer University, Malayer, Iran , hr.heidari@malayeru.ac.ir
2- Mechanical Engineering, Malayer University, Malayer, Iran , hr.heidari@malayeru.ac.ir
Abstract: (1132 Views)
In this paper, the effect of water- iron oxide (Fe3O4) nanofluid on a channel heat transfer in the presence of perpendicular to the flow variable magnetic field with creating axial obstacles using a mixed single-phasee model is investigated numerically. The effects of magnetic field are added to governing equations of ferrofluid by writing codes and the problem geometry is generated and networked in Gambit 2.4 software. The network used is constructed in a three-dimensional and the governing non-linear differential equations are solved according to the finite volume method by using the Fluent software. Also, the effect of parameters such as obstacles in the flow path, dimensionless number of magnetic field intensity and Reynolds dimensionless number on heat transfer have been studied. The results show that creating obstacles in the flow path causes turbulence in the fluid flow, which increases the overall heat transfer. Also, the application of a magnetic field on the magnetic nanofluid causes the penetration of the cool boundary layer in the central parts of the channel and with increasing the intensity of the magnetic field, the penetration of this layer increases. As a result, the amount of Nusselt number and heat transfer has increased, and this improvement in heat transfer and Nusselt number increases with increasing Reynolds number.
Type of Study: Research |
Subject:
Special
Received: 2020/08/12 | Accepted: 2021/06/20 | Published: 2022/01/30
Received: 2020/08/12 | Accepted: 2021/06/20 | Published: 2022/01/30
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