The effect of nanoparticles on laminar heat transfer in a horizontal tube

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• 作者：Adi T. Utomo ; Ehsan B. Haghighi ; Ashkan I.T. Zavareh ; Morteza Ghanbarpourgeravi ; Heiko Poth ; Rahmatollah Khodab ; eh ; Bj枚rn Palm ; Andrzej W. Pacek
• 关键词：Nanofluid ; Heat transfer coefficient ; Laminar flow
• 刊名：International Journal of Heat and Mass Transfer
• 出版年：February, 2014
• 年：2014
• 卷：69
• 期：Complete
• 页码：77-91
• 全文大小：4454 K

文摘

Heat transfer coefficient in laminar flow of water-based alumina, titania and carbon nanotube nanofluids in a straight pipe with constant heat flux at the wall have been investigated independently by two universities. The nanoparticles affect the thermo-physical properties of the suspensions, however, nanoparticles presence and movement due to Brownian diffusion and thermophoresis seemed to have insignificant effect on heat transfer coefficient. The Nusselt number of all investigated nanofluids followed standard heat transfer correlations developed for liquids within 卤10% suggesting that all investigated nanofluids can be treated as homogenous fluids. Different methods of comparison between heat transfer coefficient in nanofluids and base fluid are also critically discussed.