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 …

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 …

A methodology for modeling passive scalar mixing in homogeneous turbulence using a new
mapping closure approach is developed. The physical scalar field φ (y, t)(y‐space …

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 …

Using various closure approximation theories, the evolution of scalar quantity spectrum in a
statistically stationayj isotropic turbulent velocity field is investigate to provide a unified …

Equations for the second‐order conditional moments of reactive scalars are derived. For one‐
step reaction with equal diffusivity these can be reduced to a single equation for the …

A model for passive mixing of multiple scalars in homogeneous turbulence is developed.
This model is based on the time-evolving mapping closure methodology. Calculations from …

A new methodology to use mapping closures for the mixing of several scalars in
homogeneous turbulence is explained. The main idea is the unidimensional mapping for …

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 …