How colloid-colloid interactions and hydrodynamic effects influence the percolation threshold: A simulation study in alumina suspensions.
J Colloid Interface Sci
; 458: 241-6, 2015 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-26232284
ABSTRACT
The percolation behavior of alumina suspensions is studied by computer simulations. The percolation threshold Ïc is calculated, determining the key factors that affect its magnitude the strength of colloid-colloid attraction and the presence of hydrodynamic interactions (HIs). To isolate the effects of HIs, we compare the results of Brownian Dynamics, which do not include hydrodynamics, with those of Stochastic Rotation Dynamics-Molecular Dynamics, which include hydrodynamics. Our results show that Ïc decreases with the increase of the attraction between the colloids. The inclusion of HIs always leads to more elongated structures during the aggregation process, producing a sizable decrease of Ïc when the colloid-colloid attraction is not too strong. On the other hand, the effects of HIs on Ïc tend to become negligible with increasing attraction strength. Our Ïc values are in good agreement with those estimated by the yield stress model by Flatt and Bowen.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Coloides
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Simulação de Dinâmica Molecular
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Óxido de Alumínio
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Hidrodinâmica
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
França
País de publicação:
EEUU
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ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA