Transfer of a Passive Vector Admixture by a Two-Dimensional Turbulent Flow |
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Authors: | Novikov S. V. |
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Affiliation: | (1) St. Petersburg State University, St. Petersburg, Russia |
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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. |
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Keywords: | turbulence anomalous scaling renormalization group (renormgroup) operator product expansion |
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