| Abnormal mixing of passive scalars in chaotic flows. | |
| | |
MedLine Citation:
|
PMID: 17500792 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
|
We study the relaxation of a passive scalar towards the uniform equilibrium distribution in an advection-diffusion problem where the phase space for the pure advection problem is a mixture of chaotic domains and elliptic islands. Since the advection-diffusion problem is linear, the relaxation can be characterized by the eigenvalues and eigenmodes of the evolution operator. Almost degenerate eigenvalues then give rise to deviations from simple exponential decay behavior. We show by example that the corresponding eigenmodes can be supported by islands or weakly connected chaotic domains. These theoretical considerations are related to some experimental observations in two-dimensional flows. |
| | |
Authors:
|
O V Popovych; A Pikovsky; B Eckhardt |
Publication Detail:
|
Type: Journal Article Date: 2007-03-19 |
Journal Detail:
|
Title: Physical review. E, Statistical, nonlinear, and soft matter physics Volume: 75 ISSN: 1539-3755 ISO Abbreviation: Phys Rev E Stat Nonlin Soft Matter Phys Publication Date: 2007 Mar |
Date Detail:
|
Created Date: 2007-05-15 Completed Date: 2007-07-17 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101136452 Medline TA: Phys Rev E Stat Nonlin Soft Matter Phys Country: United States |
Other Details:
|
Languages: eng Pagination: 036308 Citation Subset: - |
Affiliation:
|
Department of Physics, University of Potsdam, 14415 Potsdam, Germany. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Role of pressure in nonlinear velocity gradient dynamics in turbulence.
Next Document: Attractor crisis and bursting in a fluid flow with two no-slip directions.