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Transfer of a Passive Vector Admixture by a Two-Dimensional Turbulent Flow
Authors:Novikov  S. V.
Affiliation:(1) St. Petersburg State University, St. Petersburg, Russia
Abstract:We consider a model of a passive vector field transfer by a random two-dimensional transverse velocity field that is uncorrelated in time and has Gaussian spatial statistics given by a powerlike correlator. We use the renormalization group and the operator product expansion techniques to show that the asymptotic approximation of the structure functions of a vector field in the inertial range is determined by the energy dissipation fluctuations. The dependence of the asymptotic approximation on the external scale of turbulence is essential and has a powerlike form (the case of an anomalous scaling). The corresponding exponents are calculated in the one-loop approximation for structure functions of an arbitrary order.
Keywords:turbulence  anomalous scaling  renormalization group (renormgroup)  operator product expansion
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