Universal Journal of Mechanical Engineering Vol. 6(4), pp. 55 - 62
DOI: 10.13189/ujme.2018.060401
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Numerical Study of the Heat Transfer Rate of Nano-fluid Flow in a Channel with a Triangular Cross-section in the Presence of a Magnetic Field


Amir Haghighatkhah , Hossein Ahmadi-Danesh-Ashtiani *, Kourosh Amiraslani
Department of Energy and Mechanical Engineering, Faculty of Engineering, South Tehran Branch, Islamic Azad University, Iran

ABSTRACT

In this study, nanofluid flow inside a triangular channel in the presence of a magnetic field with two phase model was analyzed. For this purpose, the external surface of the channel is heated or cooled with a specific heat transfer coefficient, and the effect of the changes in the Nusselt number as well as the pressure drop for variable parameters such as nanoparticle concentrations, magnetic field strength, and channel shape (relative to the circular mode) was investigated. In order to the Grid Independent Study, the Nusselt number for different sizes of grid has been evaluated. As a result, comparing the Nusselt number changes, the average is seen by changing the size of the networking. A grading with the number of 350,000 elements is suitable for simulating the corresponding problem. In order to confirm the validity of the results, simulation of Nusselt number changes during the channel was evaluated and compared with the results presented by Saeed et al. [23]. The error rate between the data presented in reference [23] and the simulation claims is not tangible, and therefore the model used for simulation has been approved. In this study, a triangular channel with a flow inside it is a nanofluid, is analyzed in the presence of a magnetic field in a smooth, completely two phases. For this purpose, the external surface of the channel with a certain heat transfer coefficient and the effect of changes in the thermal and fluid parameters with the change in the parameters involved in the problem have been observed. The results show that with increasing magnetic field, friction coefficient, in-channel velocity, heat transfer rate, average Nusselt number increase. In this study, for simulation we used computational fluid dynamics and limited volume method, and specifically using the Ansys-Fluent version 17 software. The problem is investigated in the form of a three dimensional, stable, single-phase and two-phase flow.

KEYWORDS
Nano-fluid, Channel, Cross-section, Magnetic Field

Cite this paper
Amir Haghighatkhah , Hossein Ahmadi-Danesh-Ashtiani , Kourosh Amiraslani . "Numerical Study of the Heat Transfer Rate of Nano-fluid Flow in a Channel with a Triangular Cross-section in the Presence of a Magnetic Field." Universal Journal of Mechanical Engineering 6.4 (2018) 55 - 62. doi: 10.13189/ujme.2018.060401.