This work studied the effect of interparticle friction force on the magnetorheological properties for magnetic fluid using particle-level dynamic simulations. A novel numerical model considering the friction force and elastic normal force between coarse microspheres was developed. The analysis revealed the relationship between magnetic fluid microstructure and friction coefficient ( μ ) of particles for the first time. Under steady shear flow, plate-like aggregations were formed under a moderate friction coefficient ( μ ≈ 0.2), while thick chains with large inclinations were observed under strong friction forces ( μ > 1.5). When 0.2 ≤ μ ≤ 1.5, the friction forces hardly affected the rheological properties. If μ > 1.5, friction forces could enhance the shear stress by 102%. Friction force hampered the relative movement of magnetic particles in the thick chains and enlarged the average dip angle of microstructures. The magnetic dipolar force bet...

中文翻译：

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颗粒间摩擦对磁性流体磁流变效应的影响：模拟研究

这项工作使用粒子级动态模拟研究了粒子间摩擦力对磁性流体磁流变性质的影响。建立了考虑粗糙微球之间的摩擦力和弹性法向力的新型数值模型。分析首次揭示了磁性流体微观结构与颗粒的摩擦系数（μ）之间的关系。在稳定的剪切流下，在中等摩擦系数（μ≈0.2）下形成板状聚集体，而在强摩擦力（μ> 1.5）下观察到具有大倾角的粗链。当0.2≤μ≤1.5时，摩擦力几乎不影响流变性质。如果μ> 1.5，摩擦力可使剪切应力提高102％。摩擦力阻碍了厚链中磁性颗粒的相对运动，并扩大了微结构的平均倾角。磁偶极力下注...