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2006 Chinese Phys. Lett. 23 2815-2818 doi: 10.1088/0256-307X/23/10/052
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Abstract. We investigate the characteristics of the transition from laminar to turbulent flow in the microtube with a diameter of 310 μm. 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.
PACS number: 47.27.Cn
Print publication: Issue 10 (October 2006) |
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