Lagrangian chaos and the effect of drag on the enstrophy cascade in two-dimensional turbulence

@article{Nam2000LagrangianCA,
  title={Lagrangian chaos and the effect of drag on the enstrophy cascade in two-dimensional turbulence},
  author={Nam and Martin A. Ott and Antonsen and Guzdar},
  journal={Physical review letters},
  year={2000},
  volume={84 22},
  pages={
          5134-7
        }
}
We investigate the effect of drag force on the enstrophy cascade of two-dimensional Navier-Stokes turbulence. We find a power law decrease of the energy wave number (k) spectrum that is faster than the classical (no-drag) prediction of k(-3). It is shown that the enstrophy cascade with drag can be analyzed by making use of a previous theory for finite lifetime passive scalars advected by a Lagrangian chaotic fluid flow. Using this we relate the power law exponent of the energy wave number… CONTINUE READING

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