- Title
- Similarity in the far field of a turbulent round jet
- Creator
- Burattini, Paolo; Antonia, Robert Anthony; Danaila, L.
- Relation
- Physics of Fluids Vol. 17, no. 2, 14 pages
- Publisher
- American Institute of Physics
- Resource Type
- journal article
- Date
- 2005
- Description
- In this paper, we test the idea of equilibrium similarity, for which all scales evolve in a similar way in a turbulent round jet, for a prescribed set of initial conditions. Similarity requirements of the mean momentum and turbulent energy equations are reviewed briefly but the main focus is on the velocity structure function equation, which represents an energy budget at any particular scale. For similarity of the structure function equation along the jet axis, it is found that the Taylor microscale lambda is the relevant characteristic length scale. Energy structure functions and spectra, measured at a number of locations along the axis of the jet, support this finding reasonably well, i.e., they collapse over a significant range of scales when normalized by lambda and the mean turbulent energy
- Subject
- high-reynolds-number; homogeneous isotropic turbulence; initial; conditions; passive scalar; shear flows; velocity; wakes
- Identifier
- http://hdl.handle.net/1959.13/24448
- Identifier
- uon:36
- Identifier
- ISSN:0031-9171
- Language
- eng
- Full Text
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