On Chemistry Affecting the Turbulent Flux and Turbulence Affecting Chemistry
In the atmospheric boundary layer (BL) simultaneous mixing and reacting of gases occur. Mixing is done by turbulence, which effectively brings the reactants together, but which also dilutes the mixture. To describe transport and chemical transformation in a model, two effects may become important: -1- the diffusion coefficient will depend on the chemical properties of the transported scalar, and therefore the conventional gradient diffusion approach to turbulent transport may fail; -2- in the case of bimolecu-lar reactions, the mean transformation rates can significantly change due to correlated concentration fluctuations.
KeywordsFormaldehyde Hydroxyl Covariance Ozone Hydrocarbon
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