title: On vortex entities of 2D turbulence in wavenumber space.
abstract: To connect vortices in physical space and scales in wavenumber space, spectral definitions for vortex size and momentum are introduced within the framework of a probabilistic method. At a late stage of 2D decaying turbulence, a simple solution is given for the vortex position and momentum probabilities. From the solution, an energy spectrum E(k) for self-similar vortices is constructed, which is in agreement with that observed in numerical simulations. (c) 1995 American Institute of Physics.
authors.affiliation: Mathematics Research Centre, University of Warwick, Coventry CV4 7AL, England.
authors.forename: Xinyu
authors.initials: X
authors.lastname: He