https://doi.org/10.1140/epjp/i2017-11653-y
Regular Article
Physical investigation on silver-water nanofluid natural convection for an F-shaped cavity under the magnetic field effects
1
Mechanical Group, Engineering Faculty, Islamic Azad University, Semnan Branch, Semnan, Iran
2
Faculty of Engineering, Department of Mechanical Engineering, University of Isfahan, Hezar Jerib Avenue, 81746-73441, Isfahan, Iran
3
Department of Mechanical Engineering, Esfarayen University of Technology, Esfarayen, North Khorasan, Iran
4
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, 710049, Xi’an, China
* e-mail: m.hatami2010@gmail.com
Received:
9
June
2017
Accepted:
12
July
2017
Published online:
31
August
2017
The effects of a magnetic field on a free convection regime of silver-water nanofluid are investigated. The considered geometry is an F-shaped cavity under the influence of a constant magnetic field. The left vertical walls temperature is Th, while the middle and right walls are at a constant temperature Tc, and the other walls are insulated. A FORTRAN program is developed for the numerical simulation of the considered problem. The governing equations are solved using the FVM with the SIMPLE algorithm. The effect of important physical parameters such as the Rayleigh number, the Hartmann number, AR and 
on the problem are discussed in detail. We have concluded that the increase in the Hartmann number causes a decrease in vertical velocity and heat transfer. By increasing the Rayleigh number, the influence of the Hartmann number will be increased. An increase in the dimensional ratio of the cavity causes a decrease in the Nusselt number except in AR = 0.4. The AR has the maximum impact on the local Nusselt number, at the bottom of the hot wall. The effect of the dimensional ratio of the cavity on the Nusselt number is reversed on top of the wall. The maximum value of the Nusselt number is observed at AR = 0.4.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, 2017
