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Velocity-Gradient Probability Distribution Functions in a Lagrangian Model of Turbulence by Moriconi, L.; Pereira, R. M.; Grigorio, L. S. is a scholarly article available to read on EtoBox.

What is Velocity-Gradient Probability Distribution Functions in a Lagrangian Model of Turbulence about?

The Recent Fluid Deformation Closure (RFDC) model of lagrangian turbulence is recast in path-integral language within the framework of the Martin-Siggia-Rose functional formalism. In order to derive analytical expressions for the velocity-gradient probability distribution functions (vgPDFs), we carry out noise renormalization in the low-frequency regime and find approximate extrema for the Martin-Siggia-Rose effective action. We verify, with the help of Monte Carlo simulations, that the vgPDFs so obtained yield a close description of the single-point statistical features implied by the original RFDC stochastic differential equations.

Author

Moriconi, L.; Pereira, R. M.; Grigorio, L. S.

Published

2014

Language

EN