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Göteborgs universitets publikationer

Measurement of the Enstrophy and the Vorticity Vector in a Plane Cylinder Wake using a Spectral Method

Författare och institution:
Lennart Löfdahl (Institutionen för termo- och fluiddynamik, Chalmers); Bert Johansson (Institutionen för termo- och fluiddynamik, Chalmers); Jöran Bergh (Institutionen för matematik, Chalmers/GU)
Publicerad i:
Fifth European Turbulence Conference in Siena, Italy, July 5-8 1994.,
Konferensbidrag, refereegranskat
Sammanfattning (abstract):
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.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Maskinteknik ->
Strömningsmekanik och akustik ->
Postens nummer:
Posten skapad:
2010-08-27 11:37

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