A model for the viscous coalescence of amorphous particles
A model for the viscous coalescence of amorphous particles
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DOI：
10.1006/jcis.2000.7297
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发表时间：
2001-02-15
影响因子：
9.9
通讯作者：
Helble, JJ
中科院分区：
文献类型：
--
作者：
Garabedian, RS;Helble, JJ
提出了两粒子系统中粘性流动的聚结模型，这是一种在空气污染物气溶胶的凝聚、玻璃和聚合物烧结以及液体悬浮液的凝聚等不同过程中感兴趣的现象。该模型通过引入描述流体界面的经验分析函数来提高计算效率，使其特别适合于在可能发生聚结限制增长的条件下并入气溶胶动力学模型。通过对边界积分法的改进，利用单个表面点来求解表面速度方程，从而近似地描述了聚结对中界面演化的动力学。使用这种建模方法获得的无因次收缩和颈部生长的模型预测与文献中报道的现有有限元模型相比是有利的，并为更复杂的模型近似多粒子合并提供了基础，(C)2001学术出版社。
A model is presented for coalescence by viscous flow in two-particle systems, a phenomenon of interest in such diverse processes as the coagulation of air pollutant aerosols, glass and polymer sintering, and the coagulation of liquid suspensions. The model achieves computational efficiency by incorporating an empirical analytical function to describe the fluid interface, making it particularly suited to incorporation into aerosol dynamics models under conditions where coalescence-limited growth can occur. The dynamics of the interfacial evolution in the coalescing pair are approximated by employing a modification to the boundary integral approach in which a single surface point is used to solve the equations for the surface velocities. Model predictions of dimensionless shrinkage and neck growth obtained using this modeling approach compare favorably to those of existing finite-element models reported in the literature and provide a basis for more complex models to approximate multiple particle coalescence, (C) 2001 Academic Press.