Lagrangian measurements of Vorticity and Material Elements

A 3D particle tracking velocimetry method is further developed by increasing the frequency of imaging (from 30 to 60 Hz) and improving the analysis of the flow paths. The thesis arrives at a resolution on the order of the Kolmogorov length scale. The alignment and misalignment of the principal directions of the stress tensor and vorticity and material lines is shown and discussed in detail.

More information of the project can be found in the following poster:

• 3DPTV Measurements in Isotropic Turbulence

Main publications

Lüthi, B., A. Tsinober, W. Kinzelbach, 2004. Lagrangian Measurement of Vorticity Dynamics in Turbulent Flow, JFM, in press.

Burr, U., A., Kolmyansky, M., Kinzelbach, W., Lüthi, B., Ortenberg, M. and Tsinober, A., 2002. Growth of error in quasi-isotropic turbulent flow, Advances in Turbulence, 9, p. 461-464

Contacts

W. Kinzelbach, K. Hoyer

Agency/Funding

IHW, ETH/298 kCHF

Partners

A. Tsinober, Tel Aviv University

Status

Finished in 2003

See other past research projects