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research-article

Mixed convection in a cubical cavity with active lateral walls and filled with hybrid graphene-platinum nanofluid

[+] Author and Article Information
Ahmed Kadhim Hussein

College of Engineering- Mechanical Engineering Department, University of Babylon, Babylon City, Hilla, Iraq
ahmedkadhim7474@gmail.com

Lioua Kolsi

College of Engineering, Mechanical Engineering Department, Haïl University, Haïl City, Saudi Arabia, And Research Laboratory of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir,5000 Monastir, Tunisia
lioua_enim@yahoo.fr

Mohammed A. Almeshaal

Department of Mechanical Engineering, College of Engineering, Al Imam Mohammad Ibn Saud Islamic University, Riyadh, Kingdom of Saudi Arabia
maalmeshaal@imamu.edu.sa

Dong Li

School of Architecture and Civil Engineering, Northeast Petroleum University, Fazhan Lu Street, Daqing 163318, China
lidonglvyan@126.com

HAfiz Muhammad Ali

Mechanical Engineering Department, University of Engineering and Technology, Taxila, 47050, Pakistan
h.m.ali@uettaxila.edu.pk

Israa S. Ahmed

Electromechanical Engineering Department, University of Technology, Baghdad - Iraq
israa6179@yahoo.com

1Corresponding author.

ASME doi:10.1115/1.4043758 History: Received November 23, 2018; Revised March 31, 2019

Abstract

The mixed convection in a cubical cavity with active lateral walls and filled with a graphene - platinum hybrid nanofluid was investigated numerically and exclusively in the present paper. The lateral left and back sidewalls were kept at a hot temperature (Th), while the lateral right and front sidewalls were kept at a cold temperature (Tc).Both the top and bottom walls were assumed thermally insulated. The top wall of the cavity was considered moving into two different directions. The first one in the x- direction (case I), while the second case is in the z- direction (case II). Also, the case of the fixed top wall was studied just for comparison. The solid volume fractions have been varied as [0 = = 0.1 %], while the Richardson number is varied in the range of [0.01 = Ri = 10]. It was found that the maximum average Nusselt number corresponds to the case when the top wall moving in the negative x-direction. Also, the results indicated that the average Nusselt number increases with the increase in the Richardson number and the solid volume fraction.

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