Published Article

LINEAR STABILITY OF PASSIVE CLOUDS FLOWS

N. R. Djue ; D. B. Asseke

2014
College of Mathematics and Computer Sciences University FHB of Abidjan-Cocody

Abstract: The convective clouds experience complex mechanisms in their dynamics. Among these mechanisms, instabilities appear as the main factors that drive the clouds dynamics processes. Since it is important to follow those mechanisms that draw the cloud from its passive state to an active one characterized by raindrops formation and rainfalls, this paper aims to scrutinize the role of condensation on the instabilities enhancement in the passive cloud motion. It appears that the passive cloud remains stable to infinitesimal perturbations until the level of water vapor in the flow reaches the saturation threshold value. And from there, if the water contained in the cloud is sufficient enough for the condensation process to initiate, then droplets begin to form and the equilibrium state cannot be maintained so that the passive flow evolves to an active state. The flow becomes then unstable, and the instability increases along with the cloud ensemble velocity.

Keyword(s): stability ; dispersion relation ; clouds ; mixing ratio

The record appears in these collections:
UNIVERSITE FELIX HOUPHOUET-BOIGNY > Articles UFHB
Bibliothèque Virtuelle de l'Enseignement Supérieur et de la Recherche Scientifique
UFHB

 Notice créée le 2018-12-07, modifiée le 2019-01-15



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