Experimental Study on Transitional Flow in a Circular Microtube

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

Cite this article:

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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