Bose-like condensation of Lagrangian particles and higher-order statistics in passive scalar turbulent advection

Details Bose-like condensation of Lagrangian particles and higher-order statistics in passive scalar turbulent advection Bose-like condensation of Lagrangian particles and higher-order statistics in passive scalar turbulent advection

2010-08-24

arxiv.org/abs/1008.3971v1

Physics

Fluid Dynamics

12 pages, 2 figures

Scientific paper

We establish an hitherto hidden connection between zero modes and instantons in the context of the Kraichanan model for passive scalar turbulent advection, that relies on the hypothesis that the production of strong gradients of the scalar is associated with Bose-like condensation of Lagrangian particles. It opens the way to the computation of scaling exponents of the N-th order structure functions of the scalar by techniques borrowed from many-body theory. To lowest order of approximation, scaling exponents are found to increase asymptotically as log N in two dimensions.

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