Small scale statistics of viscoelastic turbulence

Details Small scale statistics of viscoelastic turbulence Small scale statistics of viscoelastic turbulence

2006-06-15

arxiv.org/abs/nlin/0606043v1

Nonlinear Sciences

Chaotic Dynamics

7 pages, 4 figures

Scientific paper

10.1209/epl/i2006-10222-6

The small scale statistics of homogeneous isotropic turbulence of dilute polymer solutions is investigated by means of direct numerical simulations of a simplified viscoelastic fluid model. It is found that polymers only partially suppress the turbulent cascade below the Lumley scale, leaving a remnant energy flux even for large elasticity. As a consequence, fluid acceleration in viscoelastic flows is reduced with respect to Newtonian turbulence, whereas its rescaled probability density is left unchanged. At large scales the velocity field is found to be unaffected by the presence of polymers.

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