物理学报Issue(13)：1-7,7.DOI:10.7498/aps.62.134701
有结构壁面上液滴运动特征的耗散粒子动力学模拟*
Movement of a droplet on a structured substrate：A dissipative particle dynamics simulation study∗
摘要
Abstract
The last decade has witnessed the explosive development of microfluidic systems. Droplet manipulation is one of the crucial technologies in design and optimization of microfluidic devices. In the present study, dissipative particle dynamics is applied to investigate the movement of a liquid droplet actuated by a constant force on structured substrate with different wetting properties ranging from hydrophilic to hydrophobic. By monitoring the variation of the advancing contact angle and the front position of droplet, the characteristics of the droplet motion is analyzed in detail. Results indicate that there exists an optimal structure for which the droplet has a largest speed. Additionally, the influences of wettability gradient, thermal fluctuation and external force are discussed. We find thermal fluctuation is helpful for the movement of droplet.关键词
微流体/有结构壁面/润湿性/耗散粒子动力学 (DPD)Key words
microfluids/structured substrate/wettability/dissipative particle dynamics引用本文复制引用
..有结构壁面上液滴运动特征的耗散粒子动力学模拟*[J].物理学报,2013,(13):1-7,7.基金项目
国家自然科学基金(批准号:11272197)、教育部博士点基金(批准号:20103108110004)和上海市高校创新团队资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.11272197), Doctoral Fund of Ministry of Education of China (Grant No.20103108110004), and the Shanghai Program for Innovative Research Team in Universities （批准号:11272197）
