Chin. Phys. Lett.  2006, Vol. 23 Issue (10): 2815-2818    DOI:
Original Articles |
Experimental Study on Transitional Flow in a Circular Microtube
HAO Peng-Fei;YAO Zhao-Hui;HE Feng;ZHU Ke-Qin
Department of Engineering Mechanics, Tsinghua University, Beijing 100084
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HAO Peng-Fei, YAO Zhao-Hui, HE Feng et al  2006 Chin. Phys. Lett. 23 2815-2818
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Abstract We investigate the characteristics of the transition from laminar to turbulent flow in the microtube with a diameter of 310μm. The microscopic particle image velocimetry is used to measure the water flow at Re=1600--2500 in the microtube. It is found that the flow transition occurs at Re=1600--1900, and the streamwise streaks and vortices appear in the transitional flow fields. These experimental observations provide a validation for the theoretical prediction of unstable travelling waves in pipe flow.
Keywords: 47.27.Cn     
Published: 01 October 2006
PACS:  47.27.Cn (Transition to turbulence)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I10/02815
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HAO Peng-Fei
YAO Zhao-Hui
HE Feng
ZHU Ke-Qin
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