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Experiments in Fluids

, Volume 36, Issue 5, pp 741–747 | Cite as

Transition from laminar to turbulent flow in liquid filled microtubes

  • K. V. Sharp
  • R. J. Adrian
Original

Abstract

The transition to turbulent flow is studied for liquids of different polarities in glass microtubes having diameters between 50 and 247 µm. The onset of transition occurs at Reynolds numbers of ~1,800–2,000, as indicated by greater-than-laminar pressure drop and micro-PIV measurements of mean velocity and rms velocity fluctuations at the centerline. Transition at anomalously low values of Reynolds number was never observed. Additionally, the results of more than 1,500 measurements of pressure drop versus flow rate confirm the macroscopic Poiseuille flow result for laminar flow resistance to within −1% systematic and ±2.5% rms random error for Reynolds numbers less than 1,800.

Keywords

Reynolds Number Pressure Drop Friction Factor Flow Resistance Slip Length 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was supported by the Defense Advanced Research Projects Agency, Microsystems Technology Office, Microflumes and Composite Computer-Aided-Design Programs, Grant # F33615-98-1-2853.

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe Pennsylvania State UniversityUSA
  2. 2.Department of Theoretical and Applied MechanicsUniversity of Illinois at Urbana-ChampaignUrbanaUSA

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