Journal article
Backwards and forwards relative dispersion in turbulent flow: An experimental investigation
Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Meteorology, Wind Energy Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Wind Energy Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
From particle tracking velocimetry we present an experimental measure of the ratio between backwards and forwards relative dispersion in an intermediate Reynolds number turbulent flow. Lack of time-reversal symmetry implies that their ratio may be different from 1. From a stochastic model, this has recently been studied by Sawford [Phys.
Fluids 17, 095109 (2005)] giving ratios between 5 and 20. We find a value of approximately 2 and discuss it in the context of the characteristics of the rate of strain tensor s(ij). An analysis of a direct numerical simulation by Biferale [Phys. Rev. Lett. 93, 064502 (2004) and Phys. Fluids 17, 021701 (2004)] gives the same result.
Language: | English |
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Year: | 2006 |
Pages: | 016304 |
ISSN: | 24700053 , 24700045 , 15502376 and 15393755 |
Types: | Journal article |
DOI: | 10.1103/PhysRevE.74.016304 |
ORCIDs: | Berg, J. , Mann, J. and Ott, Søren |