Xing Xiu Qing, Butler David Lee, Ng Sum Huan, Wang Zhenfeng, Danyluk Steven, Yang Chun
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798.
J Colloid Interface Sci. 2007 Jul 15;311(2):609-18. doi: 10.1016/j.jcis.2007.02.088. Epub 2007 Mar 7.
A lattice Boltzmann method-based single-phase free surface model is developed to study the interfacial dynamics of coalescence, droplet formation and detachment phenomena related to surface tension and wetting effects. Compared with the conventional multiphase models, the lattice Boltzmann-based single-phase model has a higher computational efficiency since it is not necessary to simulate the motion of the gas phase. A perturbation, which is given in the same fashion as the perturbation step in Gunstensen's color model, is added to the distribution functions of the interface cells for incorporating the surface tension into the single-phase model. The assignment of different mass gradients along the fluid-wall interface is used to model the wetting properties of the solid surface. Implementations of the model are demonstrated for simulating the processes of the droplet coalescence, the droplet formation and detachment from ceiling and from nozzles with different shapes and different wall wetting properties.
开发了一种基于格子玻尔兹曼方法的单相自由表面模型，以研究与表面张力和润湿性效应相关的聚并、液滴形成和脱离现象的界面动力学。与传统的多相模型相比，基于格子玻尔兹曼的单相模型具有更高的计算效率，因为无需模拟气相的运动。以与Gunstensen颜色模型中的扰动步骤相同的方式给出的扰动被添加到界面单元的分布函数中，以便将表面张力纳入单相模型。沿流体-壁界面分配不同的质量梯度用于模拟固体表面的润湿性。通过模拟液滴聚并、液滴从天花板以及从具有不同形状和不同壁润湿性的喷嘴形成和脱离的过程，展示了该模型的实现。
