Abstract
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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Abramovich, S. and Solan, A. 1973, The Initial Development of a Submerged Laminar Round Jet, J. Fluid Mech., vol. 59, pp. 791–801.
Gharib, M., Rambod, E., Dabiri, D., Hammache, M., Shiota, T. and Sahn, D. 1994, Pulsatile Heart Flow: A Universal Time Scale, Proceedings of the Second International Conference on Experimental Fluid Mechanics. Lovrotto and Bella, Torino, Italy, pp. 34–39.
Glezer, A. and Coles, D. 1990, An Experimental Study of a Turbulent Vortex Ring, J. Fluid Mech, vol. 211, pp. 243–283
Johari, H., Rose, M., Bourque, S. and Zhang, Q. 1995, Experiments on Impulsively Started Turbulent Jets, Individual Papers in Fluids Engineering. ASME FED-207, pp. 9–16
Kouros, H., Medina, R. and Johari, H. 1993, Spreading Rate of an Unsteady Turbulent Jet, AIAA J., vol. 31, no. 8, pp. 1524–1526.
Kuo, T-W., Syed, S.A. and Bracco, F.V. 1986, Scaling of Impulsively Started, Incompressible, Laminar Round Jets and Pipe Flows, AIAA J., vol. 24, no. 3, pp. 424–428.
Lahbabi, F.Z., Boree, J., Nuglisch, H.J. and Charnay, G. 1993, Analysis of Starting and Steady Turbulent Jets by Image Processing Techniques, Third Symposium on Experimental and Numerical Flow Visualization. ASME FED- 172, pp. 356–368.
Maxworthy, T. 1974, Turbulent Vortex Rings, J. Fluid Mech, vol. 64, pp. 227–239
Turner, J.S. 1962, The ‘Starting Plume’ in Neutral Surroundings, J. Fluid Mech, vol. 13, pp. 356–368.
Willert, C. and Gharib, M. 1991, Digital Particle Image Velocimetry, Exp. Fluids, vol. 10, pp. 181–193.
Witze, P. O. 1980, The Impulsively Started Incompressible Turbulent Jet, Sandia Laboratories Report SAND 80–8617
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1997 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Johari, H., Dabiri, D., Weigand, A., Gharib, M. (1997). On the Relationship Between the Formation Number and Passive Scalar Pinch-Off in Starting Jets. In: Adrian, R.J., Durão, D.F.G., Durst, F., Heitor, M.V., Maeda, M., Whitelaw, J.H. (eds) Developments in Laser Techniques and Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60911-4_25
Download citation
DOI: https://doi.org/10.1007/978-3-642-60911-4_25
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-64604-1
Online ISBN: 978-3-642-60911-4
eBook Packages: Springer Book Archive