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| Titel |
The validity of the kinetic collection equation revisited – Part 2: Simulations for the hydrodynamic kernel |
| VerfasserIn |
L. Alfonso, G. B. Raga, D. Baumgardner |
| 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 ; 10, no. 15 ; Nr. 10, no. 15 (2010-08-05), S.7189-7195 |
| Datensatznummer |
250008679
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| Publikation (Nr.) |
 copernicus.org/acp-10-7189-2010.pdf |
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| Zusammenfassung |
| The kinetic collection equation (KCE) has been widely used to describe the
evolution of the average droplet spectrum due to the collection process that
leads to the development of precipitation in warm clouds. This
deterministic, integro-differential equation only has analytic solution for
very simple kernels. For more realistic kernels, the KCE needs to be
integrated numerically. In this study, the validity time of the KCE for the
hydrodynamic kernel is estimated by a direct comparison of Monte Carlo
simulations with numerical solutions of the KCE. The simulation results show
that when the largest droplet becomes separated from the smooth spectrum,
the total mass calculated from the numerical solution of the KCE is not
conserved and, thus, the KCE is no longer valid. This result confirms the
fact that for kernels appropriate for precipitation development within warm
clouds, the KCE can only be applied to the continuous portion of the mass
distribution. |
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