Experimental measurements were carried out of three-component velocity fields inside a cylindrical container. Flow was driven by the rotation of the top endwall disk. The purpose of the precision laser-Doppler velocimetry measurements was to describe the velocity characteristics pertinent to the vortex breakdown phenomenon. A turntable experimental apparatus was fabricated. Extensive laser-Doppler measurements, as well as flow visualizations, were made for the aspect ratio 1.50 and 2.50, and the Reynolds number ranges The measured meridional velocities were found to be consistent with the prior visualization studies. The characteristic changes in swirling motions in the vicinity of vortex breakdown bubble are depicted. Detailed flow patterns near the rotating disk are constructed by using the experimental data.
Velocity Measurements of Vortex Breakdown in an Enclosed Cylinder
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division February 1, 2000; revised manuscript received April 17, 2001. Associate Editor: M. R. Hajj.
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Fujimura, K., Yoshizawa, H., Iwatsu, R., Koyama, H. S., and Hyun, J. M. (April 17, 2001). "Velocity Measurements of Vortex Breakdown in an Enclosed Cylinder ." ASME. J. Fluids Eng. September 2001; 123(3): 604–611. https://doi.org/10.1115/1.1385834
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