An atmospheric dispersion model with continuous vertical variation of dispersion parameters |
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| Authors: | J M Quinault A B Mayhoub G Deville Cavelin |
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| Institution: | (1) IPSN-DPEI-SERE, CE Cadarache, Saint Paul Lez Durance, France;(2) Mathematics and Theoretical Physics Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt |
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| Abstract: | Summary A dispersion model is proposed to predict the continuous vertical variation of the dispersion parameters
y
and
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,
y
) andK
z
(z,
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.With 15 Figures |
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| Keywords: | |
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