The Conditional Moment Closure Approach For Atmospheric Pollution
Problems
Author(s)
E. Mastorakos
Abstract
The conditional moment closure approach for
atmospheric pollution problems
E. Mastorakos
Engineering Depariment, Cambridge University, UK
Abstract
In this paper, the Conditional Moment Closure is applied to simple problems of
reacting flows in the atmosphere with the CBM-IV chemical mechanism in order
to evaluate the effect of small-scale segregation on the evolution of the mean
pollutant concentrations. The CMC method uses modelled transport equations for
conditional averages of the reactive scalars, with the conditioning done on a
conserved scalar. Macro-mixing is taken into account by solving the transport
equation of the time-averaged conserved scalar, while micro-mixing is included
in CMC theory in models for the scalar dissipation rate. The results show that the
usual assumption of well-mixed reactants is valid for the species that react over
long timescales, but for species aftected by fast chemistry (e.g. radicals such as
HOJ, the differences between the CMC predictions and the well-mix
Keywords
Related Book
Other papers in this volume
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