The Lagrangian spectral relaxation (LSR) model is extended to treat turbulent mixing of two
passive scalars (φ α and φ β) with different molecular diffusivity coefficients (ie, differential …

Lagrangian data for velocity, scalars, and energy and scalar dissipation from direct
numerical simulations are used to validate Lagrangian mixing models for inert passive …

Lagrangian pdf methods are employed to extend the spectral relaxation (SR) model of the
scalar dissipation of an inert, passive scalar (1⩽ Sc) in homogeneous turbulence. The …

Direct numerical simulation (DNS) data are presented to study differentially diffusing
conserved scalars in isotropic turbulence. The two scalars are initially identical but …

The spectral mechanisms of the differential diffusion of pairs of passive scalars with different
molecular diffusivities are studied in stationary isotropic turbulence, using direct numerical …

The physical mechanisms underlying the dynamics of the dissipation of passive scalar
fluctuations with a uniform mean gradient in stationary isotropic turbulence are studied using …

In a companion paper, Ulitsky & Collins (2000) applied the eddy-damped quasi-normal
Markovian (EDQNM) turbulence theory to the mixing of two inert passive scalars with …

A study of the Lagrangian statistical properties of velocity and passive scalar fields using
direct numerical simulations is presented, for the case of stationary isotropic turbulence with …

A number of statistical measures of the differential diffusion of multiple scalars driven by
uniform mean gradients are studied by direct numerical simulation (DNS), in isotropic …

We consider the problem of turbulence generation at a vibrating grid in the x2–x3 plane.
Turbulence diffuses in the x1-direction. Analyzing the multi-point correlation equation using …