摘要
结合散射试验和显微摄像试验,对磁流变液在旋转外磁场作用下聚合链的动力学进行研究。试验结果表明,外磁场旋转时,流变液中的聚合链也同时旋转。聚合链的粒子总数(或链长)在低Mason数时基本不变,当大于某临界值时,由于旋转阻碍了粒子聚合的发生,聚合粒子数随Mason数减小。分子动力学模拟结果与试验结果符合得很好。
The dynamics of aggregated chains in magnetorh-elogical suspensions subject to rotating magnetic fields are experimentally studied combining scattering dichroism and video microscopy experiments. When a rotating field is imposed the chainlike aggregates rotate synchronously with the magnetic field. The total number of aggregated particles shows two different behaviors depending on Mason number. For low Mason numbers, it remains almost constant, and above the critical Mason number, the rotation of the field prevents the particle aggregation process from taking place, so the number of aggregated particles decreases with Mason number. A molecular dynamics simulation showing good agreement with the experiments results is also reported.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2005年第6期93-96,共4页
Journal of Mechanical Engineering
基金
国家自然科学基金(20299030)浙江省自然科学基金(M103028)浙江省教育厅重点基(20041174)资助项目。
关键词
磁流变液
聚合链
分子动力学
Mason数
旋转磁场
Magnetorhelogical suspensions Aggregation chain Molecular-dynamics Mason number Rotating magnetic fields
