摘要
根据Shliomis体积满足的解析关系式,理论分析了磁性颗粒浓度、环境温度和外磁场强度与方位对磁流体的Shliomis体积的影响,并通过数值模拟计算进行了定量的研究.结果表明,磁流体的Shliomis体积随磁性颗粒浓度的增加而增加;随环境温度的增加而减小,在远离磁流体熔点温度时趋于稳定值;随外磁场强度的增加而增加,且与外磁场和磁矩方位夹角有关.纵观各种因素,磁流体的黏度对其Shliomis体积的影响起着关键的作用.研究结果有助于深入了解磁流体中固体磁性颗粒磁矩的弛豫现象.
According to the analytical expression of Shliomis volume of magnetic fluid,the influence of concentrations of magnetic nanoparticles,ambient temperature and external magnetic field on Shliomis volume were analyzed theoretically and calculated numerically.The results show that Shliomis volume increases with the increase of concentration of magnetic nanoparticles, decreases with the increase of ambient temperature （tends to saturate when the temperature is far beyond the melting point of magnetic fluid）.The Shliomis volume of magnetic fluid also depends on the magnetic field’s direction and strength.The viscosity of magnetic fluid is critical to the Shliomis volume.The result is helpful for studying the magnetic moment relaxation of nanoparticles within the magnetic fluid.
出处
《上海理工大学学报》
CAS
北大核心
2015年第5期419-424,共6页
Journal of University of Shanghai For Science and Technology
基金
上海市自然科学基金资助项目(13ZR1427400)
沪江基金资助项目(B14004)
关键词
磁流体
Shliomis
体积
浓度
温度
磁场
magnetic fluid
Shliomis volume
concentration
temperature
magnetic field
