欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
本文在分子动力学模拟基础上采用了考虑黏附作用的．IKR理论取代传统Hertz理论作为颗粒间作用力，并吸取了DEM中滑动摩擦、滚动摩擦和扭动摩擦的思想建立一种细颗粒碰撞和团聚过程的多时间尺度粒子动力学模拟方法。成功地实现了颗粒在纤维上沉积过程的模拟，结果表明微米颗粒的Vander Waals力量纲约是曳力2-10倍，中心流线附近颗粒更易于在纤维上沉积，初始沉积的颗粒则会在纤维上形成“遮挡”效应。
英文摘要：
The multi-time step computational approach, developed for efficient molecular/granular dynamics simulation of disperse flow with adhesive fine particulates, are firstly applied to simulate particle deposition on a fiber under periodic conditions. The JKR theory accounting for adhesion forces, instead of Hertz contact theory, of two spheres is considered, and then sliding, rolling and twisting friction are modified in current work. The results indicate that the magnitude of Van der Waals force of 1 μm particles is about 2-10 times of those of drag force. The particle locating at the vicinity of mid-line of fiber has overwhelming possibility to deposit and then grows to a dendrite. The dendrite formation by the initial deposition will bring shadow effects to the incoming particles at the upstream side of fiber.
同期刊论文项目
同项目期刊论文
期刊信息
位置：