1998/03/27 by Patrizia Castiglione, P. Castiglione, A. Crisanti +6
Chemistry · Computer Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #NMR spectroscopy and applications #Nonlinear Dynamics and Pattern Formation #chao-dyn #nlin.CD
paper · pdf · doi:10.1088/0305-4470/31/35/002
18 latex pages, 11 figures
arxiv created 1998/03/27 · openalex publication_date 1998/09/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Explicit examples of scalar enhanced diffusion due to resonances between different transport mechanisms are presented. Their signature is provided by the sharp and narrow peaks observed in the effective diffusivity coefficients and, in the absence of molecular diffusion, by anomalous transport. For the time-dependent flow considered here, resonances arise between their oscillations in time and either molecular diffusion or a mean flow. The effective diffusivities are calculated using multiscale techniques.