
Turbulent Transport and Mixing is concerned with the fundamental physics,
mathematical modeling, analysis, and computation of the enhanced advection
and diffusion of heat, mass, and momentum that often characterizes
turbulence. Turbulent mixing is a familiar phenomenon but one which
still presents many interesting open questions. For example, how can
turbulent mixing of, say, passive scalars be quantitatively characterized?
What aspects of turbulent diffusion can be rigorously deduced from the
fundamental equations of motion? What are the most effective approaches
to reduce and/or close models of turbulent mixing? How can insights from
rigorous mathematical studies and experimental investigations aid numerical
analysis and simulations?
All these questions are addressed in our activity. Specifically, multiplescale
expansions together with Direct Numerical Simulations are exploited
to answer the above questions. The focus is the passive transport of
particles with and without inertia. Attention to the socalled anomalous
diffusion regime is also paid in these contexts.
