Ahmed, Waqar and Kazi, S. N. and Chowdhury, Zaira Zaman and Johan, Mohd Rafie and Soudagar, Manzoore Elahi M. and Mujtaba, M. A. and Gul, M. and Badruddin, Irfan Anjum and Kamangar, Sarfaraz (2021) Ultrasonic assisted new Al2O3@TiO2-ZnO/DW ternary composites nanofluids for enhanced energy transportation in a closed horizontal circular flow passage. International Communications in Heat and Mass Transfer, 120. ISSN 0735-1933, DOI https://doi.org/10.1016/j.icheatmasstransfer.2020.105018.
Full text not available from this repository.Abstract
Experiments were conducted to study the turbulent heat transfer growth of single pot sonochemically assisted new Al2O3@TiO2-ZnO/DW based ternary composite nanofluids in a closed circular heat exchanger under constant heat flux boundary conditions. The two-step facile nanofluid preparation approach was used to prepare the new ternary hybrid nanofluids. The UV-Vis and FESEM analysis were performed to confirm the absorbance and uniform dispersion of all nanoparticles. Under uniform heat flux conditions, Al2O3@TiO2-ZnO/DW based ternary composite nanofluids at 0.1, 0.075, 0.05, and 0.025 wt% reveals positive growth in heat transfer coefficient (h) and Nusselt numbers (Nu) with an increase in Reynolds (Re) number from 5849 to 24,544 without using any surfactant. The maximum increase in effective thermal conductivity was recorded up to 1.14 W/m.K for Al2O3@TiO2-ZnO/DW ternary composite nanofluids with 0.1 wt% at 45 degrees C, which increases by 69% compared to the base fluid. The overall average and local heat transfer/Nusselt numbers were noticed to improve with an increase in wt% of all metal oxide nanoparticles and Reynolds numbers (Re) under constant heat flux conditions in the circular heat exchanger. The highest heat transfer coefficient was recorded for Al2O3@TiO2-ZnO/DW ternary composite nanofluids at 0.1 wt% up to 3200 W/m(2) K for the highest Reynold (Re) numbers, which increases by 79% compared to the base fluid (DW). At 0.075 wt% the heat transfer enhancement was 2272 W/m(2) K, similarly, at 0.05 wt% the heat transfer was 2150 W/m(2) K while at 0.025 wt% the enhancement was 1950 W/m(2) K which is more than base fluid (DW). This enhancement is credited to the composite of nanoparticles with different shapes and particle sizes. The experimental results showed that the metal oxide-based new ternary composites nanofluids enhanced the thermophysical and heat transfer properties, hence, it is a suitable choice for enhanced energy transportation.
| Item Type: | Article |
|---|---|
| Funders: | King Khalid University (R. G. P. 2/74/41), Universiti Malaya, United Arab Emirates University (GPF 017A-2019), United Arab Emirates University (IF056-2019), United Arab Emirates University (31R168), United Arab Emirates University (FP143-2019A), United Arab Emirates University (TOP100PDNANOCAT) |
| Uncontrolled Keywords: | Ternary composite nanofluids; Heat transfer coefficient; Reynolds; Nusselt numbers; Thermal conductivity |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering Institute of Advanced Studies Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 05 Sep 2022 06:21 |
| Last Modified: | 05 Sep 2022 06:21 |
| URI: | http://eprints.um.edu.my/id/eprint/34138 |
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