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Forced convective heat transfer of MgO/water nanofluid under constant heat flux: experimental and statistical investigation | ||
| Challenges in Nano and Micro Scale Science and Technology | ||
| دوره 9، شماره 1، خرداد 2021، صفحه 69-80 اصل مقاله (986.56 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22111/cnmst.2021.35450.1195 | ||
| نویسنده | ||
Behrouz Raei  
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| Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran | ||
| چکیده | ||
| This paper examines experimentally the heat transfer of the internal convection of MgO-water nonofluids in a copper tube for a fully turbulent regime under constant heat flux boundary condition. The Nusselt number and convective heat transfer coefficients of nonofluids in different volumetric concentrations (0, 0.05%, and 0.15%) of nonofluids were estimated. Local convective heat transfer coefficient was also observed at different points along the pipe at different Reynolds numbers. The results showed a larger heat transfer coefficient with nonofluids compared to the base fluid. Heat transfer coefficient increased with an increase in the flow rate of nofluids from 6 to 10 l/min and the concentration of nonofluids from 0 to 0.15 vol.%. Conversely, the heat transfer coefficient decreases with increasing the nanofluid inlet temperature from 30 to 40 °C .Nusselt numbers increased to 45.9% as a result of the implementation of nonofluids at concentration of 0.15 vol.% in comparison with the base fluid. The Taguchi method was also used to analyze the results statistically. The maximum Nusselt number in nonofluids, the effect of each operational parameter on the Nusselt number, as well as the optimal values of each parameter was determined. | ||
| کلیدواژه‌ها | ||
| Design of experiment؛ Heat transfer؛ Nanofluid؛ Nusselt number | ||
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آمار تعداد مشاهده مقاله: 40 تعداد دریافت فایل اصل مقاله: 37 |
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