摘要
建立了微观颗粒的动力学模型,提出了相应的算法,模拟了二维状态下颗粒成链及其剪切流动过程,表明剪切过程中存在旧链断裂和新链形成,得到了流动时磁流变液的剪切应力,并模拟了高剪切速率下微结构的演变过程,发现新链形成速度小于旧链断裂速度,出现了剪应力下降现象。
The formation process of the chains of ferromagnetic particles under an applied magnetic field and the evolvement of the microstructure of MRF under a shear flow are simulated in this paper. Three main kinds of forces,magnetic force,viscous force and repelling force,are consiciered. A model is proposed based on the analysis to the dynamics of the particles,and the shear stress versus shear strain ratio is obtained in the simulation.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2006年第5期710-712,715,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(10472135)
关键词
磁流变液
数值模拟
流变特性
magnetorheological fluid (MRF)
simulation
theological properties