2007/12/18 by Stefano Berti, S. Berti, A. Bistagnino +4 · 1 citation
Chemical Engineering · Engineering · Medicine · Physics and Astronomy · #Blood properties and coagulation #Fluid Dynamics and Turbulent Flows #Rheology and Fluid Dynamics Studies #nlin.CD #physics.flu-dyn
paper · pdf · doi:10.1103/physreve.77.055306
arxiv created 2007/12/18 · openalex publication_date 2008/05/29 · arxiv updated 2010/06/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
We report numerical evidence of elastic turbulence phenomenology in a two-dimensional periodic Kolmogorov flow. By direct numerical simulations of the Oldroyd-B viscoelastic model at very small Reynolds numbers, we find that above the elastic instability threshold the flow develops an elastic turbulent regime. We observe that both the turbulent drag and the Lyapunov exponent increase with the Weissenberg number, indicating the presence of a disordered, turbulentlike mixing flow. The energy spectrum develops a power-law scaling range with an exponent close to the experimental and theoretical expectations.