期刊
PHYSICS OF FLUIDS
卷 22, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3526760
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资金
- NSF [ATM-0539995]
- NASA [NNX08AI47G]
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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3526760]
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