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The entrance effect on gases flow characteristics in micro-tube

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Abstract

Entrance region may have important effect on gases flow characteristics in micro-channels. It’s concluded in the available papers that the entrance effect causes significant difference. An experimental system of single-phase gas flow characteristics in microchannels was set up. Flow characteristics of nitrogen in PEEK polymer micro-tube (hydraulic diameter is 553µm) was studied experimentally. According to the data of nitrogen flow in the micro-tube with the length ranging from 0.1m to1.524m, it is shown that the friction constant becomes higher when the tube becomes shorter. By using pipe cutting methods, it’s confirmed that entrance effect is one of the key factors that cause friction constant higher than conventional theory. It’s found that friction constant of fully developed flow is lower than the value predicted by conventional theory in turbulent region. The result indicates that the flow transition occurs at Reynolds number ranging from 1600–2000. The phenomenon of obvious early transition is not found.

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References

  1. G. L. Morini, M. Lorenzini, S. Salvigni, Friction characteristics of compressible gas flows in microtubes, Experimental Thermal and Fluid Science, vol. 30, pp.733–744(2006)

    Article  Google Scholar 

  2. P. Lee, S. V. Garimella, D. Liu, Investigation of heat transfer in rectangular microchannels, International Journal of Heat and Mass Transfer, vol.48, pp.1688–1704(2005)

    Article  Google Scholar 

  3. G.P. Celata, G.L. Morini, V. Marconi, S.J. McPhail, G. Zummo, Using viscous heating to determine the friction factor in microchannels-An experimental validation, Experimental Thermal and Fluid Science.vol.30, pp. 725–731(2006)

    Article  Google Scholar 

  4. T. T. Zhang, L. Jia, Z. C. Wang, C. W. Li, Y. Jaluria, Fluid heat transfer characteristics with viscous heating in the slip flow region, Europhysics Letters, vol.85, pp. 40006–40006-6(2009)

    Article  ADS  Google Scholar 

  5. G.H. Tang, Zhou Li, Y.L. He, W.Q. Tao, Experimental study of compressibility, roughness and rarefaction influences on microchannel flow, International Journal of Heat and Mass Transfer. Vol. 50, pp.2282–2295(2007)

    Article  Google Scholar 

  6. S. Lin, C.C.K. Kwok, R.Y. Li, Z.H. Chen, Z.Y. Chen, Local frictional pressure drop during vaporization through capillary tubes, International Journal of Multiphase Flow, vol.17, pp. 95–102(1991)

    Article  MATH  Google Scholar 

  7. G.M. Mala, D.Q. Li, Flow characteristics of water in microchannels, International Journal of Heat Fluid Flow. Vol.20, pp. 142–148(1999).

    Article  Google Scholar 

  8. D. Brutin, L. Tadrist, Experimental friction factor of a liquid flow in microtubes, Physics of Fluids. Vol.15, pp. 653–661(2003)

    Article  ADS  Google Scholar 

  9. S.B. Choi, R.F. Barron, R.O. Warrington, Fluid flow and heat transfer in microtubes, Micromech. Sensor Actuator. Vol.32, pp.123–134(1991)

    Google Scholar 

  10. D. Yu, R. Warrington, R. Barron, T. Ameel, An experimental and theoretical investigation of fluid and heat transfer in microtubes, in: Proceedings of the 4th ASME/ JSME Thermal Engineering Joint Conference 1, Hawaii, pp. 523–530(1995).

  11. M.J. Kohl, S.I. Abdel-Khalik, S.M. Jeter, D.L. Sadowski, An experimental investigation of microchannel flow with internal pressure measurements, International. Journal of Heat and Mass Transfer, vol.48, pp.1518–1533(2005).

    Article  Google Scholar 

  12. D. Valougeorgis, The friction factor of a rarefied gas flow in a circular tube, Physics of Fluids, vol.19(9), pp.091702–091702-4(2007)

    Article  ADS  Google Scholar 

  13. T. T. Zhang, L. Jia, Z. C. Wang, Validation of Navier-Stokes equations for slip flow analysis within transition region, International Journal of Heat and Mass Transfer vol.51, pp.6323–6327(2008)

    Article  Google Scholar 

  14. M. E. Steinke, S. G. Kandlikar, “Single-phase liquid friction factors in microchannels,” Internatinal Journal of Thermal Sciences, vol. 45, pp.1073–1083(2006)

    Article  Google Scholar 

  15. T. T. Zhang, L. Jia, Z. C. Wang, “Validation of Navier-Stokes equations for slip flow analysis within transition region,” International Journal of Heat and Mass Transfer, vol.51, pp.6323–6327(2008)

    Article  Google Scholar 

  16. T. T. Zhang, L. Jia, X. Li, “Numerical research on entrance effect on internal flow characteristics in micro-scale,” Progress in Computational Fluid Dynamics, vol.9(2), pp.67–76(2009)

    Article  Google Scholar 

  17. T. T. Zhang, L. Jia, Z. C. Wang, “Analytic solution for steady slip flow between parallel plates with micro-scale spacing,” Chinese physics letters, vol. 25(1), pp. 180–183(2008)

    Article  ADS  Google Scholar 

  18. T. T. Zhang, L. Jia, Z. C. Wang, “A New Non-dimensional Number for Friction Characteristic of Flow in Micro-channel with Slip,” Modern physics letters B, vol. 22(15), pp.1455–1461(2008)

    Article  MATH  ADS  Google Scholar 

  19. T. T. Zhang, L. Jia, Z. C. Wang, X. Li, “The application of homotopy analysis method for 2-dimensional steady slip flow in microchannels,” Physics letters A, vol.372, pp.3223–3227(2008.)

    Article  ADS  Google Scholar 

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Authors and Affiliations

  1. Department of Power Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing, 100044, China

    Chengwen Li, Li Jia & Tiantian Zhang

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  1. Chengwen Li
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  2. Li Jia
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  3. Tiantian Zhang
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Correspondence to Li Jia.

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Li, C., Jia, L. & Zhang, T. The entrance effect on gases flow characteristics in micro-tube. J. Therm. Sci. 18, 353–357 (2009). https://doi.org/10.1007/s11630-009-0353-5

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  • DOI: https://doi.org/10.1007/s11630-009-0353-5

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