English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/15727
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 30 veces en Web of Knowledge®  |  Pub MebCentral Ver citas en PubMed Central  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Experimental analysis of coagulation of particles under low-shear flow

AutorColomer, Jordi; Peters, Francesc ; Marrasé, Cèlia
Palabras claveParticle coagulation
Concentration
Shear
Oscillating grid
Orbital shaker
Turbulence
Fecha de publicación5-jul-2005
EditorElsevier
CitaciónWater Research 39(13): 2994-3000 (2005)
ResumenThe aggregation and breakup of particle flocs were investigated by monitoring the size distribution of a suspension of aggregates, with diameter do, under shear flow created by two mixing systems. The aggregation behavior was studied in 63 experiments under various conditions of induced shear rate and particle volume concentration for particle aggregates smaller than the Kolmogorov scale. Despite small shear rates being characteristics of natural systems, only experiments with comparatively high shear rates have been conducted to date. Because of this reason, in this study, the shear rates were chosen to mimic those found in natural systems. In the first set of experiments the aggregate size, d, was analyzed by changing the mean shear, overbar-G (ranging from 0.70 to 27.36 s-1) created in a tank with a grid oscillating through the whole suspension volume. In the second set of experiments, a spherical flask was placed in an orbital shaking table where overbar-G ranged from 0.45 to 2.40 s-1. In all the cases there was an increase of d at increasing overbar-G. The dependence on d was found to be identical for the particle volume concentrations investigated, Φ = 0.2, 0.8, 2, 4, 6, 8 and 10 × 10-5, with the stable aggregate size shifting towards aggregate growth as particle volume concentration increased. These results demonstrate that shear provided a means to keep the particle number count high for collisions to occur but it is small enough that the aggregation-breakup balance is dominated by aggregation.
Descripción7 pages, 3 figures.-- Printed version published Aug 2005.-- Full-text version available Open Access at: http://www.icm.csic.es/bio/projects/icmicrobis/pdf/2005WR39.pdf
Versión del editorhttp://dx.doi.org/10.1016/j.watres.2005.04.076
URIhttp://hdl.handle.net/10261/15727
DOI10.1016/j.watres.2005.04.076
ISSN0043-1354
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.