Recurrent Bursts via Linear Processes in Turbulent Environments
2014 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 112, no 14, 144502- p.Article in journal (Refereed) Published
Large-scale instabilities occurring in the presence of small-scale turbulent fluctuations are frequently observed in geophysical or astrophysical contexts but are difficult to reproduce in the laboratory. Using extensive numerical simulations, we report here on intense recurrent bursts of turbulence in plane Poiseuille flow rotating about a spanwise axis. A simple model based on the linear instability of the mean flow can predict the structure and time scale of the nearly periodic and self-sustained burst cycles. Poiseuille flow is suggested as a prototype for future studies of low-dimensional dynamics embedded in strongly turbulent environments.
Place, publisher, year, edition, pages
2014. Vol. 112, no 14, 144502- p.
Episodic Accretion, Magnetic-Field, Star-Formation, Channel Flow, Dynamo, Simulations, Instability
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-148267DOI: 10.1103/PhysRevLett.112.144502ISI: 000338038900012ScopusID: 2-s2.0-84898405410OAI: oai:DiVA.org:kth-148267DiVA: diva2:736093
FunderSwedish Research Council, 621-2010-4147 621-2013-5784Swedish e‐Science Research Center
QC 201408052014-08-052014-08-042014-08-05Bibliographically approved