info:eu-repo/semantics/article
Dynamics of solid growth under a gravitational field: Influence of the formation of a diffusive layer
Fecha
2003-12Registro en:
Castez, Marcos Federico; Blum, Barbara; Salvarezza, Roberto Carlos; Solari, Hernan Gustavo; Dynamics of solid growth under a gravitational field: Influence of the formation of a diffusive layer; American Physical Society; Physical Review E: Statistical Physics, Plasmas, Fluids and Related Interdisciplinary Topics; 67; 6; 12-2003; 616051-616058
1063-651X
CONICET Digital
CONICET
Autor
Castez, Marcos Federico
Blum, Barbara
Salvarezza, Roberto Carlos
Solari, Hernan Gustavo
Resumen
We discuss the gravitational sedimentation of particles in terms of a stochastic model considering, in view of experimental evidence, that the aggregation to the growing surface (deposit) is mediated by the formation of a layer of suspended particles subject to gravitational forces, thermal agitation, as well as aggregation (contact) forces. The aggregation of such partially buoyant particles is ruled by the rates of occurrence of the different stochastic events: incorporation to the layer of suspended particles, sedimentation, and gravitationally biased diffusion. The model introduces bridges across different standard solid on solid deposition models which can be considered as limit cases of the present one. Analytical and numerical results show that for finite (realistic) deposits there are different regimes of aggregation including situations in which the deposit is grown completely during the transient time of the system. © 2003 The American Physical Society.