Measurement of the Enstrophy and the Vorticity Vector in a Plane Cylinder Wake using a Spectral Method
Paper in proceeding, 1994

A method to determine derivative moments using only two slanted hot-wires and a spectral method has been employed for a complete determination of the enstrophy and the vorticity vector. The general idea behind the method is to minimize the measuring volume by use of only two hot-wires and to post-process the measured data. All measurements were conducted in the far wake of a cylinder at a Reynolds number of 1840. Comparisons between the spectral method and conventional measuring techniques are made, and the results justifies the approximation between enstrophy and dissipation. For the vorticity vector it was found that the components of the normal and lateral directions were considerably larger than the stream-wise ones.

Author

Lennart Löfdahl

Chalmers, Department of Thermo and Fluid Dynamics

Bert Johansson

Chalmers, Department of Thermo and Fluid Dynamics

Jöran Bergh

Department of Mathematics

University of Gothenburg

Fifth European Turbulence Conference in Siena, Italy, July 5-8 1994.

Subject Categories

Fluid Mechanics and Acoustics

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Created

10/8/2017