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Heat Transfer Research
インパクトファクター: 1.199 5年インパクトファクター: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018025831
pages 287-309

MIXED-CONVECTION NANOFLUID FLOW THROUGH A GROOVED CHANNEL WITH INTERNAL HEAT GENERATING SOLID CYLINDERS IN THE PRESENCE OF AN APPLIED MAGNETIC FIELD

Mohammad Sadegh Dehghani
Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
Davood Semiromi Toghraie
Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
Babak Mehmandoust
Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran

要約

In this study, laminar mixed convection of alumina/water nanofluid flow in a horizontal grooved channel with internal heat generating solid cylinders in the presence of a magnetic field has been studied. The simulation is carried out in the ranges 50 ≤ Re ≤ 100, 0 ≤ Ha ≤ 100, 5000 ≤ Gr ≤ 10,000, and 0 ≤ φ ≤ 0.04. The results show that at a constant Grashof number, an increase in the Reynolds number and volume fraction of nanoparticles causes the convective heat transfer coefficient to increase. Also, at a constant Reynolds number, as the Hartmann number increases, the average Nusselt number increases. In addition, an increase in the volume fraction of nanoparticles has improved PEC at all Reynolds and Hartmann numbers. Also, at a constant volume fraction, as the Hartmann number and Reynolds number increase, the heat transfer coefficient increases. In addition, by adding nanoparticles to the base fluid, the average Nusselt number increases. When the Reynolds number is 50, the percentage increase of Nusselt number with a volume fraction of 3% relative to the base fluid is 4.97%.


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