Alawi, Omer A. and Mallah, A. R. and Kazi, S. N. (2020) Covalently functionalized pentaethylene glycol-thermally treated graphene towards enhanced thermophysical and heat transfer characteristics. Journal of Thermal Analysis and Calorimetry, 140 (2). pp. 859-874. ISSN 1388-6150, DOI https://doi.org/10.1007/s10973-019-08831-3.
Full text not available from this repository.Abstract
The current study outlined the use of synthesized, covalently functionalized pentaethylene glycol-thermally treated graphene (PEG-TGr). Miscible PEG was decorated in order to achieve a long-stable aqueous colloidal dispersion. The experimentations were performed using the Reynolds number range of 6401-11,907, constant wall heat flux of 11,205 W/m(2), and mass fraction of 0.025, 0.05, 0.075, and 0.1%. The effective thermophysical characteristics, heat and momentum transfer for fully developed turbulent flow patterns of PEG-TGr nanofluids over a square heated pipe were examined. Performance index, performance evaluation criterion, and pumping power were assessed to evaluate the performance of nanofluids. An augmentation in thermal conductivity of PEG-TGr was observed in 29.74% in comparison with the base fluid. The heat transfer coefficient enhancement of PEG-TGr was about 41.18% with respect to distilled water data. Nonlinear regression correlations were experimentally developed to calculate the thermal conductivity, dynamic viscosity, Nusselt number, and friction number. It seems that PEG-TGr nanofluids perform as working fluids for heat transfer purposes and offer great alternative options to standard operating fluids inside the thermal fluid devices.
| Item Type: | Article |
|---|---|
| Funders: | None |
| Uncontrolled Keywords: | Few-layer graphene; Pentaethylene glycol; Thermophysical properties; Convective heat transfer; Turbulent flow |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 06 Nov 2024 01:12 |
| Last Modified: | 06 Nov 2024 01:12 |
| URI: | http://eprints.um.edu.my/id/eprint/36773 |
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