Manifestations of Drag Reduction by Polymer Additives in Decaying, Homogeneous, Isotropic Turbulence
arXiv:nlin/0609066 · doi:10.1103/PhysRevLett.97.264501
Abstract
The existence of drag reduction by polymer additives, well established for wall-bounded turbulent flows, is controversial in homogeneous, isotropic turbulence. To settle this controversy we carry out a high-resolution direct numerical simulation (DNS) of decaying, homogeneous, isotropic turbulence with polymer additives. Our study reveals clear manifestations of drag-reduction-type 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.
4 pages, 3 figures
References in corpus (2)
Cited by in corpus (27)
- Statistical Properties of Turbulence: An Overview
- Deformation and break-up of viscoelastic droplets in confined shear flow
- Effect of polymer-stress diffusion in the numerical simulation of elastic turbulence
- Systematics of the magnetic-Prandtl-number dependence of homogeneous, isotropic magnetohydrodynamic turbulence
- Direct numerical simulations of statistically steady, homogeneous, isotropic fluid turbulence with polymer additives
- Liquid velocity fluctuations and energy spectra in three-dimensional buoyancy driven bubbly flows
- Hybrid Lattice Boltzmann/Finite Difference simulations of viscoelastic multicomponent flows in confined geometries
- Variable energy flux in turbulence
- Scaling and intermittency in turbulent flows of elastoviscoplastic fluids
- Statistics of polymer extensions in turbulent channel flow
- On the Peterlin approximation for turbulent flows of polymer solutions
- Kinetic energy spectra and flux in turbulent phase-separating symmetric binary-fluid mixtures
- A Lattice Boltzmann study of the effects of viscoelasticity on droplet formation in microfluidic cross-junctions
- Binary-Fluid Turbulence: Signatures of Multifractal Droplet Dynamics and Dissipation Reduction
- Two-dimensional, homogeneous, isotropic fluid turbulence with polymer additives
- Melting of a nonequilibrium vortex crystal in a fluid film with polymers : elastic versus fluid turbulence
- Polymer scission in turbulent flows
- Control of particle clustering in turbulence by polymer additives
- Droplets in isotropic turbulence: deformation and breakup statistics
- Effects of viscoelasticity on droplet dynamics and break-up in microfluidic T-Junctions: a lattice Boltzmann study
- Preserving large-scale features in simulations of elastic turbulence
- Turbulent drag reduction in magnetohydrodynamic and quasi-static magnetohydrodynamic turbulence
- Viscoelastic laminar drag bounds in pipe flow
- Drag reduction by polymer additives from turbulent spectra
- Energy, enstrophy and helicity transfers in polymeric turbulence
- Turbulence of Dilute Polymer Solution
- Large is different: non-monotonic behaviour of elastic range scaling in polymeric turbulence at large Reynolds and Deborah numbers