CFD simulation of hydrothermal of a nanofluid in a microchannel subjected to a magnetic field

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 3، دوره 13، شماره 3، آبان 2021، صفحه 13-20   

نوع مقاله: Research article

نویسندگان

Mohammad Reza Assari^{* 1}؛ Arman Mohammadian²؛ Alireza Jafar Gholibeik²

¹Faculty of Mechanical and Chemistry Engineering, Jundi-Shapur University of Technology, Dezful, Iran

²Department of Mechanical Engineering, Jundi-shapur University of Technology, Dezful, Iran

چکیده

In this study, CFD simulation of hydrothermal of a nanofluid in a microchannel under a magnetic field with spherical depressions and protrusions on hot and cold walls is investigated. The effects of increasing Hartman (Ha) and Reynolds numbers (Re) in various volume fraction (φ) are investigated. The governing equation by using single-phase model, finite volume method and SIMPLE algorithm are solved. Also it assumes the flow is laminar, steady-state and incompressible. The simulation are considered in ranges of 10 ≤ Re ≤150, 0 ≤ Ha ≤10, and 0 ≤ φ ≤0.03. The findings illustrate that in a certain Ha number, increasing in Re number and φ cause the Nu number increase. Also in a constant Re number, As the Ha number increases, the mean Nu number increases. Likewise, an increase in φ has enhanced heat transfer in all Re and Ha numbers. In a certain φ, as Ha number and Re number enhance, the Nu number increases. By enhancing thermal conductivity, the heat transfer increases. When Re=150, the percentage increase of heat transfer in φ=0.03 relative to pure fluid is %5.98.

کلیدواژه‌ها

Magnetic field؛ Microchannel Nanofluid؛ Numerical investigation؛ Heat transfer

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