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Lagragian micromixing models for concentration fluctuations: an overview

pubblicazioni - Articolo ISI

Lagragian micromixing models for concentration fluctuations: an overview

This article presents a brief overview of the main features, theoretical formulations and case studies on some of the Lagrangian micromixing models, used to estimate the average of the whole and of the turbulent fluctuations of the concentration. Their fields of application concerning the various phenomena of dispersion of pollutants such as: accidents, odor, leakage at the micro-scale continuous emissions or releases of short duration, industrial processes, strongly non-linear relationship between concentration and damage, reactions dependent on the instantaneous concentration.

This paper presents a brief overview of the main features, theoretical formulations and validation tests of some Lagrangian micromixing models, currently used for estimations of the ensemble mean and the turbulent fluctuations of concentration. Their application fields regards several pollutant dispersion phenomena such as: accidents (power or production plants, terroristic attacks, hydrocarbons storage and transport, extraordinary emissions), odours (power plants and energy production from waste resources -compost, dumps, incinerators, biogas storage and smokes-, high enthalpy geothermic plants -sulfide hydrogen-, animal farms), micro-scale dispersion from continuous or spot emissions (traffic pollutants, power and production plants, dispersion in aquatic environments…), industrial processes (combustion, pollutant treatment,…), strong non-linear relationship between concentration and damage (inflammable substances, explosions,..), reactions depending on instantaneous concentrations.

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