Shear-induced reaction-limited aggregation kinetics of Brownian particles at arbitrary concentrations
Articolo
Data di Pubblicazione:
2010
Citazione:
Shear-induced reaction-limited aggregation kinetics of Brownian particles at arbitrary concentrations / A. Zaccone, D. Gentili, H. Wu, M. Morbidelli. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - 132:13(2010), pp. 134903.1-134903.6. [10.1063/1.3361665]
Abstract:
The aggregation of interacting Brownian particles in sheared concentrated suspensions is an important issue in colloid and soft matter science per se. Also, it serves as a model to understand biochemical reactions occurring in vivo where both crowding and shear play an important role. We present an effective medium approach within the Smoluchowski equation with shear which allows one to calculate the encounter kinetics through a potential barrier under shear at arbitrary colloid concentrations. Experiments on a model colloidal system in simple shear flow support the validity of the model in the concentration range considered. By generalizing Kramers' rate theory to the presence of shear and collective hydrodynamics, our model explains the significant increase in the shear-induced reaction-limited aggregation kinetics upon increasing the colloid concentration.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Zaccone, D. Gentili, H. Wu, M. Morbidelli
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