The Equilibrium Orientation of Scalar Gradient in a Lagrangian Model of Three-dimensional Turbulence

Michel Gonzalez (1)

1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie

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.

Domaines: Mécanique des fluides [physics.class-ph]; Milieux fluides et réactifs

Michel Gonzalez. The Equilibrium Orientation of Scalar Gradient in a Lagrangian Model of Three-dimensional Turbulence. Journal of the Physical Society of Japan, 2019, 88 (8), pp.085001. ⟨10.7566/JPSJ.88.085001⟩. ⟨hal-02181450⟩