Next Article in Journal
Discrimination of Non-Local Correlations
Previous Article in Journal
Using High-Frequency Entropy to Forecast Bitcoin’s Daily Value at Risk
Article

Entropy Generation Optimization for Rarified Nanofluid Flows in a Square Cavity with Two Fins at the Hot Wall

1
Mechatronics Engineering Department, German Jordanian University, Amman 11180, Jordan
2
Mechanical and Maintenance Engineering Department, German Jordanian University, Amman 11180, Jordan
3
Aeronautical Engineering Department, Jordan University of Science and Technology, Irbid 22110, Jordan
4
Energy Engineering Department, German Jordanian University, Amman 11180, Jordan
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(2), 103; https://doi.org/10.3390/e21020103
Received: 6 January 2019 / Revised: 15 January 2019 / Accepted: 16 January 2019 / Published: 22 January 2019
Computational Fluid Dynamics (CFD) is utilized to study entropy generation for the rarefied steady state laminar 2-D flow of air-Al2O3 nanofluid in a square cavity equipped with two solid fins at the hot wall. Such flows are of great importance in industrial applications, such as the cooling of electronic equipment and nuclear reactors. In this current study, effects of the Knudsen number (Kn), Rayleigh number (Ra) and the nano solid particle’s volume fraction ( ϕ ) on entropy generation were investigated. The values of the parameters considered in this work were as follows: 0 K n 0.1 , 10 3 R a 10 6 ,   0 ϕ 0.2 . The length of the fins (LF) was considered to be fixed and equal to 0.5 m, whereas the location of the fins with respect to the lower wall (HF) was set to 0.25 and 0.75 m. Simulations demonstrated that there was an inverse direct effect of Kn on the entropy generation. Moreover, it was found that when Ra was less than 104, the entropy generation, due to the flow, increased as ϕ increases. In addition, the entropy generation due to the flow will decrease at Ra greater than 104 as ϕ increases. Moreover, the entropy generation due to heat will increase as both the ϕ and Ra increase. In addition, a correlation model of the total entropy generation as a function of all of the investigated parameters in this study was proposed. Finally, an optimization technique was adapted to find out the conditions at which the total entropy generation was minimized. View Full-Text
Keywords: natural convection; entropy generation; square cavity; low pressure; nanofluid natural convection; entropy generation; square cavity; low pressure; nanofluid
Show Figures

Figure 1

MDPI and ACS Style

Al-Kouz, W.; Al-Muhtady, A.; Owhaib, W.; Al-Dahidi, S.; Hader, M.; Abu-Alghanam, R. Entropy Generation Optimization for Rarified Nanofluid Flows in a Square Cavity with Two Fins at the Hot Wall. Entropy 2019, 21, 103. https://doi.org/10.3390/e21020103

AMA Style

Al-Kouz W, Al-Muhtady A, Owhaib W, Al-Dahidi S, Hader M, Abu-Alghanam R. Entropy Generation Optimization for Rarified Nanofluid Flows in a Square Cavity with Two Fins at the Hot Wall. Entropy. 2019; 21(2):103. https://doi.org/10.3390/e21020103

Chicago/Turabian Style

Al-Kouz, Wael, Ahmad Al-Muhtady, Wahib Owhaib, Sameer Al-Dahidi, Montasir Hader, and Rama Abu-Alghanam. 2019. "Entropy Generation Optimization for Rarified Nanofluid Flows in a Square Cavity with Two Fins at the Hot Wall" Entropy 21, no. 2: 103. https://doi.org/10.3390/e21020103

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop