Characteristics of small vortices were studied in axisymmetric jets wherein the Kolmogorov scale was approached by progressively decreasing the Reynolds number while still maintaining turbulent flow. A periodic forcing introduced far upstream of the jet nozzle ensured that the jet was turbulent. A vortex eduction tool was developed and applied to the high-pass filtered velocity field in the axial plane of a turbulent jet while varying Re between 140 and 2600. Vortex population, energy, vorticity, and rms (root-mean-square velocity fluctuations) of the high-pass filtered field were measured to elucidate vortex characteristics. The observed population of vortices decreases dramatically at the Kolmogorov scale. The observed increase in vortex population with decreasing vortex size appears to be in accord with the space-filling argument, in that the vortex population in a two-dimensional domain should grow as . The energy density curve obtained from vortex statistics reproduces the slope for the inertial subrange, and the high-pass filtered field accounts for approximately two-thirds of the total rms.
Skip Nav Destination
e-mail: prasad@me.udel.edu
Article navigation
Technical Papers
Characteristics of Small Vortices in a Turbulent Axisymmetric Jet
Sudhaker Chhabra,
Sudhaker Chhabra
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19716-3140
Search for other works by this author on:
Pablo Huq,
Pablo Huq
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19716-3140
Search for other works by this author on:
Ajay K. Prasad
Ajay K. Prasad
Department of Mechanical Engineering,
e-mail: prasad@me.udel.edu
University of Delaware
, Newark, DE 19716-3140
Search for other works by this author on:
Sudhaker Chhabra
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19716-3140
Pablo Huq
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19716-3140
Ajay K. Prasad
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19716-3140e-mail: prasad@me.udel.edu
J. Fluids Eng. May 2006, 128(3): 439-445 (7 pages)
Published Online: October 25, 2005
Article history
Received:
September 10, 2004
Revised:
October 25, 2005
Citation
Chhabra, S., Huq, P., and Prasad, A. K. (October 25, 2005). "Characteristics of Small Vortices in a Turbulent Axisymmetric Jet." ASME. J. Fluids Eng. May 2006; 128(3): 439–445. https://doi.org/10.1115/1.2173292
Download citation file:
Get Email Alerts
Cited By
Switching Events of Wakes Shed From Two Short Flapping Side-by-Side Cylinders
J. Fluids Eng (May 2025)
Related Articles
Statistical Properties of Round, Square, and Elliptic Jets at Low and Moderate Reynolds Numbers
J. Fluids Eng (October,2017)
Buoyancy Dominated He – O 2 Separated Jet Mixing in a Tubular Reactor
J. Fluids Eng (September,2008)
Influence of Reynolds Number on the Evolution of a Plane Air Jet Issuing From a Slit
J. Fluids Eng (October,2007)
On the Development of Incompressible Round and Equilateral Triangular Jets Due to Reynolds Number Variation
J. Fluids Eng (November,2018)
Related Proceedings Papers
Related Chapters
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Antilock-Braking System Using Fuzzy Logic
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
Vortex-Induced Vibration
Flow Induced Vibration of Power and Process Plant Components: A Practical Workbook