Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives

Details Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives

2010-07-31

arxiv.org/abs/1008.0051v2

Phys. Rev. E 82, 066313 (2010)

Physics

Fluid Dynamics

consistent with the published version

Scientific paper

10.1103/PhysRevE.82.066313

We carry out a direct numerical simulation (DNS) study that reveals the effects of polymers on statistically steady, forced, homogeneous, isotropic fluid turbulence. We find clear manifestations of dissipation-reduction phenomena: On the addition of polymers to the turbulent fluid, we obtain a reduction in the energy dissipation rate, a significant modification of the fluid energy spectrum, especially in the deep-dissipation range, a suppression of small-scale intermittency, and a decrease in small-scale vorticity filaments. We also compare our results with recent experiments and earlier DNS studies of decaying fluid turbulence with polymer additives.

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