The Equilibrium Orientation of Scalar Gradient in a Lagrangian Model of Three-dimensional Turbulence
Résumé
The kinematics of scalar gradient in three-dimensional turbulence is revisited using stochastic Lagrangian modelling. The equilibrium direction is computed numerically. It noticeably departs from the compressional direction, and is the attracting -- and preferential -- alignment for the scalar gradient.
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