Enhancement of thermal conductivity and kinematic viscosity in magnetically controllable maghemite (γ-Fe2O3) nanofluids

Nurdin, Irwan and Yaacob, Iskandar Idris and Johan, Mohd. Rafie (2016) Enhancement of thermal conductivity and kinematic viscosity in magnetically controllable maghemite (γ-Fe2O3) nanofluids. Experiment Thermal and Fluid Science, 77. pp. 265-271. ISSN 0894-1777

	PDF - Published Version Restricted to Repository staff only Download (1MB) | Request a copy
	PDF (WOS) - Supplemental Material Restricted to Repository staff only Download (202kB) | Request a copy
	PDF (SCOPUS) - Supplemental Material Restricted to Repository staff only Download (325kB) | Request a copy

Abstract

The objective of this study is to investigate the thermal conductivity and kinematic viscosity enhancement of maghemite nanofluids at various particle volume fractions (0.1%, 0.2%, 0.3%, 0.4%, 0.5% and 0.6%) under the influence of an external magnetic field in different orientations (parallel and perpendicular). The effect of magnetic field strength and orientation on these properties is investigated at two temperatures of maghemite nanofluids (25 and 30 °C). The results show that the thermal conductivity enhancement of maghemite nanofluids increases with an increase in the magnetic field strength. The highest thermal conductivity enhancement (39.09%) is attained at the following experimental conditions: (1) particle volume fraction: 0.6%, (2) magnetic field strength: 300 Gauss, (3) temperature of maghemite nanofluid: 30 °C and (4) magnetic field orientation: parallel. The results also show that the kinematic viscosity enhancement of the maghemite nanofluids increases with an increase in the magnetic field strength. Likewise, the highest kinematic viscosity enhancement (31.91%) is attained at the above-mentioned experimental conditions. Based on the results, it can be concluded that both the magnetic field strength and orientation has a significant effect on the thermal conductivity and kinematic viscosity enhancement of maghemite nanofluids.

Item Type:	Article (Journal)
Additional Information:	6524/51915
Uncontrolled Keywords:	Enhancement; Thermal conductivity; Kinematic viscosity; Maghemite; Magnetic field
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ170 Mechanics applied to machinery. Dynamics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Prof. Dr. Iskandar Idris Yaacob
Date Deposited:	07 Sep 2016 17:10
Last Modified:	21 Dec 2016 09:26
URI:	http://irep.iium.edu.my/id/eprint/51915

Actions (login required)

View Item