结合布朗力与范德华力的磁流变液沉降模拟  

Simulation of magnetorheological fluid sedimentation considering Brownian and Van der Waals forces

作　　者：吕彤辉 魏镜弢[1] 李伊伦 吴张永[1] LYU Tonghui;WEI Jingtao;LI Yilun;WU Zhangyong(School of Mechatronics Engineering,Kunming University of Science and Technology,Kunming 650504,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650504

出　　处：《功能材料》2024年第6期6095-6100,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51165012)。

摘　　要：为提升磁流变液沉降稳定性的研究效率,改善只能通过实验检测磁流变液沉降性能的现状,本文通过动力学方法模拟磁性颗粒的微观力学模型,提出了无磁场条件下的磁流变液沉降模拟方法,并以基于电感的沉降检测实验验证了模拟方法的有效性。磁流变液的沉降过程是在无磁场环境下进行的,因此,文章在磁场条件下磁流变液微观力学模型的基础上,引入布朗力与范德华力的作用,去除了磁场对磁性颗粒的影响,并提出了考虑布朗力与范德华力的磁流变液沉降模拟方法;将磁流变液的各项参数代入到前文提出的磁流变液沉降模拟方法中,并与基于电感的磁流变液沉降检测实验数据进行对比,以验证所提方法的有效性。结果表明,引入布朗力与范德华力的磁流变液沉降模拟方法可以较为准确地预测磁流变液的沉降速率,有效解决当前磁流变液沉降稳定性研究耗时较长的缺点。In an effort to enhance the research efficiency of magnetorheological fluid(MRF)sedimentation stability and to improve the current reliance on experimental measurement for assessing sedimentation performance,this paper employs a kinetic approach to simulate a microscale mechanical model for magnetic particles.We propose a simulation method for MRF sedimentation under zero magnetic field conditions and validate it through inductance-based sedimentation detection experiments.Since MRF sedimentation occurs in the absence of a magnetic field,we extend the microscale mechanical model,originally developed under the influence of a magnetic field,by introducing the effects of Brownian and van der Waals forces.The simulation method is parameterized with MRF-specific values and compared against experimental data obtained through inductance-based sedimentation detection.The results demonstrate that the introduced simulation method,incorporating Brownian and van der Waals forces,accurately predicts MRF sedimentation rates,effectively addressing the time-consuming nature of current investigations into MRF sedimentation stability.

关 键 词：磁流变液 数值模拟 沉降稳定性 布朗力 范德华力 

分 类 号：TB381[一般工业技术—材料科学与工程]