Thermal conductivity of water based magnetite ferrofluids at different temperature for heat transfer applications

Haiza, Haroon and Yaacob, Iskandar Idris and Ahmad Azhar, Ahmad Zahirani (2018) Thermal conductivity of water based magnetite ferrofluids at different temperature for heat transfer applications. In: International Conference on Sustainable Materials, ICoSM 2018, 16th Apr. 2018, Bangkok, Thailand.

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Abstract

Magnetic magnetite, Fe3O4 nanoparticles produced by Massart’s procedure were used to prepare water based magnetite, Fe3O4 ferrofluids without addition of any stabilizing agent or surfactant. The thermal properties and suspension stabilization of the ferrofluids were investigated by varying the magnetite, Fe3O4 nanoparticles concentration in the ferrofluids prepared. The thermal conductivity of water based ferrofluids prepared using five different volume fraction of magnetite, Fe3O4 suspension (0.1, 0.05, 0.02, 0.01 and 0.005) were measured at five different temperature, 25°C, 30°C, 40°C, 50°C and 60°C in order to evaluate its potential application as heat transfer fluid. The results shows that the thermal conductivity of the ferrofluids are higher than the base fluid, and the thermal conductivity of the ferrofluids increased as the magnetite concentration in the ferrofluids decreased however reached its optimum for ferrofluids prepared using 0.01 volume fraction of magnetite suspension over 0.99 volume fraction of water. Accordingly, the thermal conductivity of the ferrofluids significantly increased as the temperature increased where 49.4% enhancement with respect to water were observed at temperature 60°C.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	6524/70592
Uncontrolled Keywords:	Ferrofluids, Magnetic materials, Magnetite, Nanoparticles, Thermal conductivity
Subjects:	T Technology > T Technology (General) > T55.4 Industrial engineering.Management engineering. > T58.7 Production capacity. Manufacturing capacity T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering Kulliyyah of Engineering
Depositing User:	Prof. Dr. Iskandar Idris Yaacob
Date Deposited:	07 Aug 2020 16:34
Last Modified:	07 Aug 2020 16:34
URI:	http://irep.iium.edu.my/id/eprint/70592

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