Free convection and entropy generation of a nanofluid in a tilted triangular cavity exposed to a magnetic field with sinusoidal wall temperature distribution considering radiation effects. (March 2020)

• Record Type: Journal Article
• Authors: Afrand, Masoud; Pordanjani, Ahmad Hajatzadeh; Aghakhani, Saeed; Oztop, Hakan F.; Abu-Hamdeh, Nidal
• Is Part Of: International communications in heat and mass transfer. Volume 112(2020:Mar.)
• Publication Date: 2020-03
• Subjects: Nanofluid -- MF -- Radiation heat transfer -- Triangular enclosure -- Sinusoidal wall -- Entropy production; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Heat -- Transmission; Mass transfer; Periodicals; 621.4022
• DOI: 10.1016/j.icheatmasstransfer.2020.104507
• Languages: English
• ISSNs: 0735-1933

Abstract

Abstract: In this research, free convective heat transfer and entropy production of alumina/water nanofluid in a tilted triangular enclosure are studied considering radiation impacts and inclined constant magnetic field (MF). SIMPLE algorithm is used to solve the governing equations. The impact of effective parameters consist of Ra, Ha, MF angle, enclosure angle, radiation parameter and concentration of alumina nano-materials on the convective heat transfer, the entropy production and the Bejan number (Be) are examined. The findings reveal that the heat transfer rate (HTR) increased 2.32 times and the entropy production augmented 14.17 times with growing the Ra . The HTR and total entropy production (TEG) diminish by augmenting the Ha . The Be enhances by decreasing the Ra and growing the Ha . The maximum HTR takes place at MF angle of 90° and also at the enclosure angle of 60°. The HTR enhances 7.3% and the TEG rises by 9.3% when 6% of the nano-materials was added to the water.