High-framing rate PIV for vortex ring visualisation

Cole, D.E., and Liow, J-L. (2005) High-framing rate PIV for vortex ring visualisation. In: Proceedings of the Fourth Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion, pp. 25-28. From: Fourth Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion, 7-9 December 2005, McLaren Vale, SA, Australia.

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Abstract

A high framing rate particle image velocimetry (HFR-PIV) study (3000 Hz) was carried out on the vortex ring shed from a water drop impinging on a pool of water to provide velocity and vorticity data. The impact conditions were We=ll and F/=13. The maximum velocity measured in the vortex core was 0.45 m/s. The propagation velocity and vortex diameter were measured to be 0.18 m/s and 2.4 mm respectively. The HFR-PIV also showed the presence of two counter rotating vortices (or vortex ring) travelling parallel to the free surface moments after impact confirming a theoretical prediction by Peck and Sigurdson [11]. Visual observation of this vortex ring travelling along the free surface is difficult as it usually contains insufficient dye to be identified.

Item ID: 14817
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: drop formation; high-framing rate PIV; vortex ring
ISBN: 978-0-9757855-2-2
Date Deposited: 26 Nov 2010 00:55
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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