An atmospheric dispersion model with continuous vertical variation of dispersion parameters

Autor: A. B. Mayhoub, J. M. Quinault, G. Deville Cavelin
Rok vydání: 1997
Předmět:
Zdroj: Theoretical and Applied Climatology. 58:113-127
ISSN: 1434-4483
0177-798X
DOI: 10.1007/bf00867438
Popis: A dispersion model is proposed to predict the continuous vertical variation of the dispersion parametersσ y andσ z in case of hot pollutant release to the atmosphere. In such a case, the plume rises far above the ground and is subject to varying levels of turbulence. The framework in this paper can be divided into three approaches: (1) determination of the eddy diffusivitiesK y (z, σ y ) andK z (z, σ z ) as functions of height above ground and plume dimensions, (2) determination of both the plume rise and its vertical velocity using a modified version of Brigg's formula, and (3) numerical solution of actual problems with buoyant plumes at each time step. The model results have been applied to a case of pollutant release from fire destruction of a chemical storehouse roof.
Databáze: OpenAIRE
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