Dynamic Shear Flow Behavior of Magneto-Rheological Fluid between Two Rotating Parallel Disks under Relatively Weak Magnetic Field
Dynamic Shear Flow Behavior of Magneto-Rheological Fluid between Two Rotating Parallel Disks under Relatively Weak Magnetic Field
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DOI：
10.1299/jsmeb.48.494
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发表时间：
2005-08
期刊：
影响因子：
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通讯作者：
M. Nakano;Akira Satou;Y. Sugamata;H. Nishiyama
中科院分区：
文献类型：
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作者：
M. Nakano;Akira Satou;Y. Sugamata;H. Nishiyama
用平行圆盘式旋转流变仪同时研究了恒定剪切速率和较弱磁场下磁流变液的瞬时剪应力变化和流型。研究了磁场、剪切速率和间隙高度对磁流变液诱导剪应力和流动行为的影响。剪切应力行为发生显著变化，流动形态多样(填充式磁流变液结构中的裂隙、颗粒状颗粒的团聚、颗粒线等)。根据这些参数，可以观察到磁流变液从缝隙中泄漏出来。离心力引起的磁流变液泄漏量也取决于这些参数。剪切应力的瞬时变化可能与磁流变液的斑纹演化和渗漏有关。
The transient shear stress variation and the flow patterns of an MR fluid have been investigated simultaneously under constant shear rate and relatively weak magnetic field using a parallel disk rotary rheometer. The effects of magnetic field, shear rate and gap height on the induced shear stress and the flow behavior of the MR fluid were evaluated. The behavior of shear stress changes remarkably and various flow patterns (cracks in packed MR fluid structure, grain-like particle’s agglomeration, line of grains, etc.) with MR fluid leakage out of the gap can be observed, depending on these parameters. The amount of the MR fluid leakage due to the centrifugal force also depends on these parameters. Both the evolution of pattern and the leakage of MR fluid might be responsible for the transient variation of shear stress.