Lyapunov exponents of heavy particles in turbulence

  title={Lyapunov exponents of heavy particles in turbulence},
  author={J{\'e}r{\'e}mie Bec and Luca Biferale and Guido Boffetta and Massimo Cencini and Stefano Musacchio and Federico Toschi},
  journal={Physics of Fluids},
Lyapunov exponents of heavy particles and tracers advected by homogeneous and isotropic turbulent flows are investigated by means of direct numerical simulations. For large values of the Stokes number, the main effect of inertia is to reduce the chaoticity with respect to fluid tracers. Conversely, for small inertia, a counterintuitive increase of the first Lyapunov exponent is observed. The flow intermittency is found to induce a Reynolds number dependency for the statistics of the finite-time… 

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