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Experimental investigation on the stability of 40% ethylene glycol based TiO2-Al2O3 hybrid nanofluids

Urmi, Wajiha Tasnim and Rahman, Md. Mustafizur and Wan Hamzah, Wan Azmi and Kadirgama, Kumaran and Ramasamy, Devarajan and Maleque, Md. Abdul (2020) Experimental investigation on the stability of 40% ethylene glycol based TiO2-Al2O3 hybrid nanofluids. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 69 (1). pp. 110-121. ISSN 2289-7879

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This paper is presented to investigate experimentally on the stability of 40% ethylene glycol-based TiO2-Al2O3 hybrid nanofluids. Recently, the research is more highlighted on the thermophysical-properties of nanofluids. Hence, the stability of the hybrid nanofluids thoroughly assessed in this research work. The study uses the two-step method for preparing 40% ethylene glycol-based TiO2-Al2O3 hybrid nanofluids. The experiment is carried out for the various combination of mixture ratios including 20:80, 40:60, 50:50, 60:40 and 80:20 of TiO2-Al2O3 nanoparticles with a volume concentration of 0.1%. The stability assessment of hybrid nanofluids is accomplished through visualisation effect, transmission electronic microscopic observation, UV-Vis spectrophotometry and zeta potential value from particle size analyser. The findings show the optimum mixing ratios of TiO2-Al2O3 nanoparticles in terms of stability which is further confirmed by Zeta potential and absorbency from UV-Vis spectrophotometry. The results from the study reveal that 80:20 ratio of TiO2-Al2O3 nanoparticles possesses the best uniformity for over 21 days without any noticeable settlement of particles in the colloidal suspension. Moreover, 50:50 and 60:40 ratios show modest stability for almost two weeks while 20:80 and 40:60 ratios of TiO2-Al2O3 nanoparticles show minimum stability along with rapid sedimentation in the dispersion. However, it is also evident that the optimum mixing ratio of TiO2-Al2O3 hybrid nanofluids has excellent stability which will lead to further study on the thermal properties of nanofluids and finally motivate engineers to the real-life application of nanofluids.

Item Type: Article (Journal)
Additional Information: 6103/85948
Uncontrolled Keywords: Hybrid nanofluids; stability; sedimentation photograph; ultravoiletvisible spectral analysis; zeta potential
Subjects: T Technology > T Technology (General) > T11.95 Industrial directories
T Technology > T Technology (General) > T175 Industrial research. Research and development
T Technology > TN Mining engineering. Metallurgy > TN799.5 Nonmetallic minerals
T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
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. Md Abdul Maleque
Date Deposited: 08 Dec 2020 15:55
Last Modified: 08 Dec 2020 15:55
URI: http://irep.iium.edu.my/id/eprint/85948

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