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| Titel |
A Lagrangian Stochastic Model for the concentration fluctuations |
| VerfasserIn |
L. Mortarini, E. Ferrero |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 5, no. 9 ; Nr. 5, no. 9 (2005-09-23), S.2539-2545 |
| Datensatznummer |
250003074
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| Publikation (Nr.) |
 copernicus.org/acp-5-2539-2005.pdf |
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| Zusammenfassung |
| A Lagrangian Stochastic Model for the two-particles dispersion, aiming
at simulating the pollutant concentration fluctuations, is
presented. Three model versions (1-D, 2-D and 3-D) are tested. Firstly the
ability of the model to reproduce the two-particle statistics in a
homogeneous isotropic turbulence is discussed, comparing the model
results with theoretical predictions in terms of the probability density
function (PDF) of the particles separation and its statistics. Then, the
mean concentration and its fluctuations are considered and the results
presented. The influence of the PDF of the
particle separation on the concentration fluctuations is shown and
discussed. We found that the separation PDF in the inertial subrange
is not gaussian and this fact influences the predicted concentration
fluctuations. |
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