The phenomenon of vortex merging in two-dimensional hydrodynamics has been investigated through direct numerical simulations. The fast and local processes that occur during the turbulent relaxation of a randomly initialized system in periodic geometry have been examined. The analysis reveals that many of the coherent structures can be described by a local principle of maximization of entropy. The validity of this entropy principle has been further confirmed by time-dependent statistics using a contour-tracking technique. Implications for the description of persistent coherent vortices commonly observed in nature are suggested, including growing evidence for the wide applicability of maximum entropy-based relaxation principles. Â© 2010 American Institute of Physics.
Local relaxation and maximum entropy in two-dimensional turbulence / Wan, M; Matthaeus, Wh; Carbone, Vincenzo. - In: PHYSICS OF FLUIDS. - ISSN 1070-6631. - 22:12(2010), pp. 125107-1-125107-12.
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|Titolo:||Local relaxation and maximum entropy in two-dimensional turbulence|
|Data di pubblicazione:||2010|
|Citazione:||Local relaxation and maximum entropy in two-dimensional turbulence / Wan, M; Matthaeus, Wh; Carbone, Vincenzo. - In: PHYSICS OF FLUIDS. - ISSN 1070-6631. - 22:12(2010), pp. 125107-1-125107-12.|
|Appare nelle tipologie:||1.1 Articolo in rivista|