MIXED CONVECTION FLUID FLOW AND HEAT TRANSFER OF THE Al<sub>2</sub>O<sub>3</sub>&minus;WATER NANOFLUID WITH VARIABLE PROPERTIES IN A CAVITY WITH AN INSIDE QUADRILATERAL OBSTACLE

Mohammad Hemmat Esfe; Amir Hossein  Refahi; Hamid  Teimouri; Mohammaj javad  Noroozi; Masoud Afrand; Arash Karimipour

doi:10.1615/HeatTransRes.2015007328

Heat Transfer Research

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Publicado 18 números por año

ISSN Imprimir: 1064-2285

ISSN En Línea: 2162-6561

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MIXED CONVECTION FLUID FLOW AND HEAT TRANSFER OF THE Al₂O₃−WATER NANOFLUID WITH VARIABLE PROPERTIES IN A CAVITY WITH AN INSIDE QUADRILATERAL OBSTACLE

Volumen 46, Edición 5, 2015, pp. 465-482

DOI: 10.1615/HeatTransRes.2015007328

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Mohammad Hemmat Esfe
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Amir Hossein Refahi
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran

Hamid Teimouri
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran

Mohammaj javad Noroozi
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran

Masoud Afrand
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.

Arash Karimipour
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran

SINOPSIS

This investigation is focused on mixed convection fluid flow and heat transfer of Al₂O₃−water inside a square enclosure containing a hot rectangular obstacle at its bottom wall. The governing equations have been solved using the finite volume method. The SIMPLER algorithm was employed to couple the velocity and pressure fields. Utilizing the developed code, a parametric study was conducted and the impact of important parameters such as the solid volume fraction, Richardson number, size of the hot obstacle on the fluid flow and thermal fields and heat transfer inside the enclosure were investigated. The results show that for all Richardson numbers, the average Nusselt number increases with increase in the volume fraction of nanoparticles. Moreover, at all values of the Richardson number, heat transfer decreases when the height of the heated obstacle increases.

PALABRAS CLAVE: nanofluid, nano heat transfer, mixed convection, lid-driven cavity

CITADO POR

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