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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Abstract
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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