Bidisperse Aggregation and Gel Formation via Simultaneous Convection and Diffusion
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- 作者：Ian J. Laurenzi and Scott L. Diamond
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2002
- 出版时间：February 6, 2002
- 年：2002
- 卷：41
- 期：3
- 页码：413 - 420
- 全文大小：112K
- 年卷期：v.41,no.3(February 6, 2002)
- ISSN：1520-5045
文摘
Stochastic simulations are performed for two-component transport-limited aggregation processeswith Brownian motion and shear contributing to the collision frequency. To study the effects ofboth mechanisms, the radius ratio of the initially pure particles is 1:8 on average, with thelarger particles having sizes on the order of microns (
m). For a mixed orthokinetic-perikinetickernel, the kinetics of the aggregation process and gel point are shown to have a cooperativedependence on shear and the relative concentration of large particles to small ones. This wasfound to be a result of the shear sensitivity of the aggregation process to the addition of largeparticles. Ultimately, it is shown that accurate prediction of the kinetics and gel points of complexaggregation phenomena requires the use of the stochastic approach to the aggregation kineticsupon which the simulations are based.
m). For a mixed orthokinetic-perikinetickernel, the kinetics of the aggregation process and gel point are shown to have a cooperativedependence on shear and the relative concentration of large particles to small ones. This wasfound to be a result of the shear sensitivity of the aggregation process to the addition of largeparticles. Ultimately, it is shown that accurate prediction of the kinetics and gel points of complexaggregation phenomena requires the use of the stochastic approach to the aggregation kineticsupon which the simulations are based.