- Title
- Scaling of mixed longitudinal-transverse velocity structure functions
- Creator
- Xu, G.; Antonia, R. A.; Rajagopalan, S. R.
- Relation
- Europhysics Letters Vol. 79, Issue 4
- Publisher Link
- http://dx.doi.org/10.1209/0295-5075/79/44001
- Publisher
- EDP Sciences
- Resource Type
- journal article
- Date
- 2007
- Description
- Measurements in a turbulent round jet at a Taylor microscale Reynolds number Rλ of about 500 indicate that the mixed structure functions of u, the longitudinal velocity fluctuation, and v, the transverse velocity fluctuation, show a larger departure from the Kolmogorov scaling than the u structure functions, and a smaller departure than the v structure functions. Although the scaling exponents of the temperature structure functions are nearly equal to those of the v structure functions at a comparable order, the mixed structure functions of u and the temperature fluctuation θ exhibits a smaller departure from the Kolmogorov scaling than either u or θ structure functions at the same order. The difference between the scaling behaviour of these two mixed structure functions mainly reflects the difference in correlation between (∂u/∂x)² and either (∂v/∂x)² or (∂θ/∂x)², implying that there is an important difference between temperature and velocity fields.
- Subject
- velocity; scaling; structure functions; temperature
- Identifier
- http://hdl.handle.net/1959.13/33254
- Identifier
- uon:3130
- Identifier
- ISSN:0295-5075
- Rights
- The original publication is available at http://www.afs-journal.org/
- Language
- eng
- Full Text
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