Data/hora: 01/06/2024 06:39:02

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | A simple model for the break-up of marine aggregates by turbulent shear
Autores: | Ruiz, Jean-eric; Izquierdo, A.
Data: | 1997
Ano: | 1997
Resumo: | A simple model for the break-up, by turbulent shear, of marine aggregates is proposed. Three factors are considered to control the rupture of aggregates of different sizes. First, turbulence exerts stronger shear forces on bigger aggregates. Second, big aggregates are weaker than small ones because their porosity increases. Third, the rate of rupture of an aggregate is considered to be dependent on the point in the aggregate where the rupture takes place. This third factor allows the determination of the size distribution resulting from aggregate break-up. By considering these factors the model predicts the break-up rates of aggregates of different sizes and the aggregates' size-distribution resulting from this break-up. Therefore, the model represents an attempt to complete the general dynamic equation presented by McCave (1984) as the governing equation for the dynamics of pelagic particles. When implemented in a more general model of particle dynamics, the break-up model produces results that are consistent with empirical observations of the break-up of aggregates. Also, it provides a theoretical explanation for these results.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00093/20417/18084.pdf
Editor: | Gauthier-Villars
Relação: | http://archimer.ifremer.fr/doc/00093/20417/
Formato: | application/pdf
Fonte: | Oceanolica Acta (0399-1784) (Gauthier-Villars), 1997 , Vol. 20 , N. 4 , P. 597-605