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Experiments About Simple Liquid Flows in Microtubes

[+] Author Affiliations
Zhan-Hua Li, Hai-Hang Cui

Chinese Academy of Sciences, Beijing, China

Paper No. ICMM2003-1099, pp. 759-763; 5 pages
  • ASME 2003 1st International Conference on Microchannels and Minichannels
  • 1st International Conference on Microchannels and Minichannels
  • Rochester, New York, USA, April 24–25, 2003
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-3667-3
  • Copyright © 2003 by ASME


The behavior of micro-scale flow is significant for the performance of Micro-Electro-Mechanical-Systems (MEMS) devices. Some experiments about liquid flow through microtubes with diameters about 3∼20μm are presented here. The liquids used in our experiments include some simple liquids with small molecules, such as non-ion water and several kinds of organic liquids (CCL4 , C6 H5 C2 H5 and Isopropanol etc.). The flow rate and the normalized friction coefficients were measured in micro-flow experimental apparatus. The results show that when the driven pressure varies from 0 to 1Mpa, the flow behaviors in 20μm microtube for both polar and non-polar liquids are in agreement with Hagen-Poiseuille law of the classical theory. It means that N-S equation based on continuous medium still acts well in this case. For higher pressure drop from 1 to 30Mpa, in the microtubes with diameter of 3∼10μm, the normalized friction coefficients of organic liquids can’t keep constant with pressure increases. However the non-ion water reveals different trends.

Copyright © 2003 by ASME
Topics: Flow (Dynamics)



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