An experimental comparison of water based alumina and silica nanofluids heat transfer in laminar flow regime
来源期刊：中南大学学报(英文版)2013年第12期
论文作者：Azari Ahmad Kalbasi Mansour Derakhshandeh Masoud
文章页码：3582 - 3588
Key words：convection; forced convection; heat transfer; nano scale heat transfer
Abstract: Experimental investigations were carried out to determine the convective heat transfer performance and pressure drop of Al2O3/water and SiO2/water nanofluids flowing through a circular tube. Measurements show that the addition of small amounts of nano-sized Al2O3 particles to the base fluid increases heat transfer coefficients considerably, while the result for the silica nanofluids contradicts with the alumina nanofluids and this leads to some interesting results. In the case of alumina nanofluids, an average increase of 16% in convective heat transfer coefficient is observed with an average penalty of 28% in pressure drop. Moreover, flow resistance increases significantly compared to the base fluid even at very low concentrations of nanofluids. Finally, measured heat transfer coefficients are compared with predicted ones from the correlation of Shah under the same conditions.
Azari Ahmad, Kalbasi Mansour, Derakhshandeh Masoud
(Depertment of Petrochemical Engineering, Amirkabir University of Technology (Tehran Polytechnic),
Mahshahr Campus, Mahshahr, P. O. Box 415, Iran)
Abstract:Experimental investigations were carried out to determine the convective heat transfer performance and pressure drop of Al2O3/water and SiO2/water nanofluids flowing through a circular tube. Measurements show that the addition of small amounts of nano-sized Al2O3 particles to the base fluid increases heat transfer coefficients considerably, while the result for the silica nanofluids contradicts with the alumina nanofluids and this leads to some interesting results. In the case of alumina nanofluids, an average increase of 16% in convective heat transfer coefficient is observed with an average penalty of 28% in pressure drop. Moreover, flow resistance increases significantly compared to the base fluid even at very low concentrations of nanofluids. Finally, measured heat transfer coefficients are compared with predicted ones from the correlation of Shah under the same conditions.
Key words:convection; forced convection; heat transfer; nano scale heat transfer
