On the Field Theoretical Approach to the Anomalous Scaling in Turbulence

Details On the Field Theoretical Approach to the Anomalous Scaling in Turbulence On the Field Theoretical Approach to the Anomalous Scaling in Turbulence

1999-06-15

arxiv.org/abs/chao-dyn/9906026v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, RevTeX

Scientific paper

Anomalous scaling problem in the stochastic Navier-Stokes equation is treated in the framework of the field theoretical approach, successfully applied earlier to the Kraichnan rapid advection model. Two cases of the space dimensions d=2 and d->infinity, which allow essential simplification of the calculations, are analysed. The presence of infinite set of the Galilean invariant composite operators with negative critical dimensions in the model discussed has been proved. It allows, as well as for the Kraichnan model, to justify the anomalous scaling of the structure functions. The explicit expression for the junior operator of this set, related to the square of energy dissipation operator, has been found in the first order of the epsilon-expansion. Its critical dimension is strongly negative in the two dimensional case and vanishes while d->infinity.

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