Mixing in fully chaotic flows.

  title={Mixing in fully chaotic flows.},
  author={A Wonhas and J. Christos Vassilicos},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={66 5 Pt 1},
Passive scalar mixing in fully chaotic flows is usually explained in terms of Lyapunov exponents, i.e., rates of particle pair separations. We present a unified review of this approach (which encapsulates also other nonchaotic flows) and investigate its limitations. During the final stage of mixing, when the scalar variance decays exponentially, Lyapunov exponents can fail to describe the mixing process. The failure occurs when another mixing mechanism, first introduced by Fereday et al. [Phys… CONTINUE READING