Moura, A. and Degrazia, G. and Vilhena, M. (2002) Two-dimensional dispersion analytical approach: Eddy diffusivities depending on source distance. Il nuovo cimento C, 25 (3). pp. 273-286. ISSN 1826-9885
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Abstract
An analytical air quality dispersion approach based on the steadystate two-dimensional advection-diffusion equation is presented. The solution employs a spectral method and is analytical in the sense that no approximation is made along its derivation. The approach is valid for homogeneous turbulence and for situations of uniform mean wind speed, and for practical purposes, to elevated releases that occur in neutral stability conditions without strong buoyancy. To simulate and compare the results of this approach against observed ground-level crosswind-integrated concentration two eddy diffusivities are considered. The first eddy diffusivity depends on the distance from the source while the second one assumes a constant value independent of the source distance. It is found that the memory effect contained in the eddy diffusivity, which is a function of downwind distance from the source, allows a better description of the turbulent dispersion of atmospheric contaminants released by an elevated continuous point source.
| Item Type: | Article |
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| Uncontrolled Keywords: | Air quality and air pollution ; Boundary layer structure and processes |
| Subjects: | 300 Scienze sociali > 360 Problemi e servizi sociali; associazioni > 363 Altri problemi e servizi sociali > 363.7 Problemi ambientali (classificare qui la tutela ambientale; l’effetto dei rifiuti, dell’inquinamento, delle iniziative per controllarli) > 363.73 Inquinamento > 363.739 Inquinamento di specifici ambienti > 363.7392 Inquinamento atmosferico |
| Depositing User: | Marina Spanti |
| Date Deposited: | 12 Mar 2020 12:49 |
| Last Modified: | 12 Mar 2020 12:49 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/14794 |
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