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On the Relationship Between the Formation Number and Passive Scalar Pinch-Off in Starting Jets

Johari, H. and Dabiri, D. and Weigand, A. and Gharib, M. (1997) On the Relationship Between the Formation Number and Passive Scalar Pinch-Off in Starting Jets. In: Developments in Laser Techniques and Fluid Mechanics. Springer Berlin Heidelberg , Berlin, Heidelberg, pp. 399-410. ISBN 9783642646041.

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A series of experiments were conducted in a water tank to investigate the behavior of starting vortex ring in starting jets at Reynolds numbers up to 2 × 10⁴. The starting vortex separates from the rest of jet in the near-field. The velocity vectors were measured via the digital particle image velocimetry while the passive scalar concentrations were observed by the laser sheet technique. The measured Formation number was in the range of 4.5 to 5.5, consistent with previous low Reynolds number results. The Formation number appears to be a robust parameter for characterizing the pinch-off of vorticity in starting jets.

Item Type:Book Section
Related URLs:
URLURL TypeDescription ReadCube access
Dabiri, D.0000-0003-3573-6897
Gharib, M.0000-0003-0754-4193
Additional Information:© Springer-Verlag Berlin Heidelberg 1997.
Subject Keywords:Starting Jets; Formation Number; Particle Image Velocimetry
Record Number:CaltechAUTHORS:20201207-153033450
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106953
Deposited On:09 Dec 2020 18:33
Last Modified:18 Apr 2023 19:04

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