本项目拟探索适合动态毛细浸润现象研究的耗散粒子动力学（DPD）流固界面模型；利用DPD方法详细研究在动态条件下的毛细浸润现象，诸如微通道中液体的受迫流动以及毛细自动注入的动态过程等，阐述动态毛细、浸润现象的介观尺度作用机理，寻求避免液气固三相接触线应力奇异问题的依据；研究由有限拉伸非线性弹性（FENE）链构成的非牛顿流体的毛细浸润现象，讨论FENE链模型参数对非牛顿流体毛细浸润过程的影响。研究微结构粗糙表面对于液体毛细浸润特性所产生的重要作用，从各种不同拓扑形貌的微结构粗糙表面的形式中提取物理现象背后的主导因素。模拟液滴在不同的微结构粗糙表面上的碰撞、反弹行为，分析不同浸润性粗糙表面对于液滴碰撞、反弹的影响。模拟复杂微通道网络内的流体流动，讨论毛细浸润作用对于复杂微通道网络内流体流动行为的影响。本项目拟为表面科学机理研究、微流体器件的研发、防冰材料的设计等提供详细的介观尺度数值模拟信息。

A mesoscopic fluid-solid interface model suitable for the study on dynamic capillary wetting phenomena by dissipative particle dynamics (DPD) will be explored. The dynamic capillary wetting phenomena such as forced wetting in a capillary slit and capillary impregnation in microtube will be simulated by DPD, in which the capillary wetting mechanism at a mesoscale will be analysed, and the effective ways of avoiding the stress singularity at the triple line will be considered. The capillary wetting processes of Non-Newtonian fluids consisting of finite extensible non-linear elastic (FENE) bead spring chains will be simulated, and the effects of FENE chain parameters will be investigated. The important role played by microstructured rough surfaces in the properties of capillary wetting phenomena will be studied, and the underlying physics will be probed from different topographies of microstructured surfaces. The repulsion behaviors of impacting droplets on mocrostrutured superhydrobic surfaces will be analysed, and the effects of different types of microstructure superhydarbic surfaces will be assessed. The fluid flow behaviors in microchannel network will be simulated, accounting for the influences of capillary wetting on the flow behaviors. The proposal, by supplying with detailed mesoscopic DPD simulation information, will be aimed at understanding the fundamentals in terms of interface science research, development of MEMS devices and design of anti-icing materials etc.