Backwards and forwards relative dispersion in turbulent flow: an experimental investigation.

@article{Berg2006BackwardsAF,
  title={Backwards and forwards relative dispersion in turbulent flow: an experimental investigation.},
  author={Jacob Berg and Beat L{\"u}thi and Jakob Mann and S\oren Ott},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2006},
  volume={74 1 Pt 2},
  pages={016304}
}
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 et al [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… CONTINUE READING