A critical review of forced convection heat transfer and pressure drop of Al2O3, TiO2 and CuO nanofluids
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- 作者：Deepak Khurana ; Rajesh Choudhary ; Sudhakar Subudhi
- 刊名：Heat and Mass Transfer
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：53
- 期：1
- 页码：343-361
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Engineering Thermodynamics, Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Thermodynamics;
- 出版者：Springer Berlin Heidelberg
- ISSN：1432-1181
- 卷排序：53
文摘
Nanofluid is the colloidal suspension of nanosized solid particles like metals or metal oxides in some conventional fluids like water and ethylene glycol. Due to its unique characteristics of enhanced heat transfer compared to conventional fluid, it has attracted the attention of research community. The forced convection heat transfer of nanofluid is investigated by numerous researchers. This paper critically reviews the papers published on experimental studies of forced convection heat transfer and pressure drop of Al2O3, TiO2 and CuO based nanofluids dispersed in water, ethylene glycol and water–ethylene glycol mixture. Most of the researchers have shown a little rise in pressure drop with the use of nanofluids in plain tube. Literature has reported that the pumping power is appreciably high, only at very high particle concentration i.e. more than 5 %. As nanofluids are able to enhance the heat transfer at low particle concentrations so most of the researchers have used less than 3 % volume concentration in their studies. Almost no disagreement is observed on pressure drop results of different researchers. But there is not a common agreement in magnitude and mechanism of heat transfer enhancement. Few studies have shown an anomalous enhancement in heat transfer even at low particle concentration. On the contrary, some researchers have shown little heat transfer enhancement at the same particle concentration. A large variation (2–3 times) in Nusselt number was observed for few studies under similar conditions.