In this Brief Communication we describe a consistent method for calculating the conditional
scalar dissipation (or diffusion) rate for inhomogeneous turbulent flows. The model follows …

In applications to turbulent reactive flows, the probability density function approach requires
a model for molecular diffusivity. The objective of the present work is to develop a consistent …

Scalar mixing models are required to model turbulent molecular mixing in full probability
density function (pdf) simulations of turbulent reacting flows. Despite the existence of direct …

A new method for calculating the conditional scalar dissipation rate< N| η> is derived from
the probability density function (pdf) transport equation for the conserved scalar Z. Two …

We use simple scalar mixing models coupled to a Lagrangian stochastic trajectory model to
calculate a range of conditional scalar statistics for three different source configurations, a …

The objectives of this paper are (i) to establish analytically some important features of the
scalar diffusion process in turbulence and (ii) to derive a closure model for this process in …

A novel mapping closure approximation (MCA) technique is developed to construct a model
for the conditional dissipation rate (CDR) of a scalar in homogeneous turbulence. It is shown …

The modelling of differential diffusion with a conditional moment closure (CMC) method is
considered. Direct numerical simulations for scalar fields in homogeneous isotropic …

We employ direct numerical simulations to study the mixing of two passive scalars in
stationary, homogeneous, isotropic turbulence. The present work is a direct extension of that …

We analyze experimentally the statistical properties of a turbulent mixing created in the gap
between two counter-rotating disks at a Taylor Reynolds number R λ≈ 400. Local isotropy is …