摘要
考虑电流变液多粒子近程相互作用 ,利用等效平板电导模型 ,研究了电流变液流动过程相转变点的特性 ,并设计实验观察了电流变液中的这种相转变现象 .研究结果表明 ,电流变液在一定压力梯度作用下发生流动 ,此时为双相流 ;当外加电场达到某一值时 ,电流变液中颗粒不流动 ,由固液双相流转变为液体单相流动 ,发生场控相转变 ,理论模拟结果与实验观察结果基本相符 .阈值电场随外加压力梯度的增加而加大 ,随颗粒浓度的增加而减小 .
Considering the short range interaction of multi particles, we have employed the equivalent plate conductivity model to simulate the phase transition of solid liquid electrorheological(ER) fluids in flow process. We also devised experiment to observe the phase transition of ER fluids. The conclusions show that under the certain pressure the ER fluids begin to flow, here the flow is the two phase flow. But when the strength of external electric field reaches a certain threshold value, the particles in ER fluids stop flowing, so the flow of ER fluids changes into one phase flow, the phase transition happens. The phase transition observed in our experiment complies with the simulation fundamentally. The threshold strength of external electric field increases with the increasing pressure, and decreases with the concentration of particles in ER fluids.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第2期405-410,共6页
Acta Physica Sinica
基金
国家杰出青年科学基金 (批准号 :5 0 0 2 5 2 0 7)
国家自然科学基金重大研究计划 (批准号 :90 10 10 0 5 )资助的课题~~
