Weigand, A. and Gharib, M. (1997) On the evolution of laminar vortex rings. Experiments in Fluids, 22 (6). pp. 447-457. ISSN 0723-4864. doi:10.1007/s003480050071. https://resolver.caltech.edu/CaltechAUTHORS:20130912-104447890
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Abstract
Using Laser Doppler Anemometry (LDA) and Digital Particle Image Velocimetry (DPIV), the physical properties of laminar vortex rings are investigated in the Reynolds-number range 830 ≤ Re ≤ 1650. The measured initial circulations of the vortex rings are found to agree well with corrected versions of the vorticity-flux (slug-flow) model proposed by Didden and Pullin. The DPIV and LDA data show excellent agreement regarding local velocities and vortex-ring circulations. The DPIV data depict the distribution of the vorticity and circulation in the core regions, where the resulting vorticity distributions are found to be self-similar Gaussian profiles. The propagation velocity of the vortex rings is well approximated by an analytical model of Saffman for large core sizes. In the asymptotic limit t → ∞, the trajectories are in excellent agreement with the exact Stokes-dipole solution of Cantwell and Rott.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1997 Springer-Verlag. Received: 11 October 1995; Accepted: 22 March 1996. The support of the Office of Naval Research (ONR-URI grant N00014-92-J-1610) under the program management of Dr. Edwin Rood is gratefully acknowledged. | |||||||||
| Group: | GALCIT | |||||||||
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| Issue or Number: | 6 | |||||||||
| DOI: | 10.1007/s003480050071 | |||||||||
| Record Number: | CaltechAUTHORS:20130912-104447890 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130912-104447890 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 41287 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 12 Sep 2013 22:52 | |||||||||
| Last Modified: | 10 Nov 2021 04:28 |
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