The flow and the heat transfer characteristics in quartz microtube with inner diameter of 0.0196mm are investigated experimentally. By measuring the pressure drop between the inlet and outlet of microtube with different working fluid and the average temperature of microtube wall heated by steam, the corresponding friction factors and Nusselt number are obtained. The experimental results show the friction factors in microtubes exceeds the prediction of Hagen-Poiseulle due to the predominance of the electrical double layer effect (EDL effect) when the working fluid is distilled water, and the experimental Nusselt number is less than the classical laminar at Reynolds number<500 due to the effects of the variation of the thermophysical properties with temperature and the conjugate heat transfer. However, the effect of viscous dissipation results in temperature rise of the working fluid, due to which the friction factors are less than the prediction of Hagen-Poiseulle with the working fluid of tetrachloromethane. Using nitrogen gas as the working fluid, the rarefaction effect still brings on that the friction factor is less than the classical laminar solution, though gas density and viscosity increases resulted from the stagnant velocity between gas and inner wall and the viscous heating lead to the increase of friction factor.
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ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels
June 23–25, 2008
Darmstadt, Germany
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4834-5
PROCEEDINGS PAPER
Flow and Heat Transfer in 0.0196mm Quartz Microtube Available to Purchase
Zhigang Liu,
Zhigang Liu
Shandong Academy of Sciences, Jinan, China
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Ning Guan,
Ning Guan
Shandong Academy of Sciences, Jinan, China
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Masahiro Takei
Masahiro Takei
Nippon University, Tokyo, Japan
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Zhigang Liu
Shandong Academy of Sciences, Jinan, China
Ning Guan
Shandong Academy of Sciences, Jinan, China
Masahiro Takei
Nippon University, Tokyo, Japan
Paper No:
ICNMM2008-62105, pp. 173-180; 8 pages
Published Online:
June 11, 2009
Citation
Liu, Z, Guan, N, & Takei, M. "Flow and Heat Transfer in 0.0196mm Quartz Microtube." Proceedings of the ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. Darmstadt, Germany. June 23–25, 2008. pp. 173-180. ASME. https://doi.org/10.1115/ICNMM2008-62105
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