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Experimentally Investigate the Vortex Ferro-Viscosity under Directional Field

机译:通过实验研究方向下的涡旋铁粘度

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In this study, apparent ferro-viscosity on directional magnetic field applied, through the evaluation of mean piping flow velocity, is examined. Here various vortex ferro-viscosities induced from directional filed intensity is quite different from the constant thermal property considered in traditional fluid dynamics, which could be used as a lubricator reducing the tribology for dynamical ferro-device. To understand how the ferro-viscosity varying with ferro-magnetization under the enforcement of horizontal and vertical field respectively, an auxiliary electromagnetic mechanism is then designed and set up. With it, both apparent viscosity ,for ferro-concentration Φ 0.4 and 0.04, could be experienced at a faster growth within field strength 6-18 mT where the quick magnetization of ferro-particles just starts working. And the empirical viscosities measured at field vertically positioned are found to be lower than those induced at the deployment of field aligning with axial ferro-flow. While compared with analytic results on Langevin theory, vortex viscosity for ferro-concentration Φ 0.4, accessed from individual field settled above, behave a good agreement within the working magnetic intensity 0~36 mT and their maximum relative errors will be less than 10% while the working temperature remains at 25 ° c.
机译:在该研究中,通过评估平均管道流速来检查在施加方向磁场上的表观铁粘度。这里,由定向归档强度引起的各种涡旋铁粘度与传统流体动力学中所考虑的恒定热特性不同,这可以用作减少动态铁装置的摩擦学的润滑剂。为了了解如何在水平和垂直场的实施下与铁磁体变化的铁粘度如何设计并设置辅助电磁机构。通过它,对于铁浓度φ0和0.04的表观粘度既可以在距离那场强度6-18 mt内的速度增长时经历,其中铁粒子的快速磁化刚刚开始工作。并且发现在垂直定位的场上测量的经验粘度低于与轴向铁流量的场对准的展开时诱导的粘度。虽然与Langevin理论的分析结果相比,从上面落户的各个场的涡流粘度φ0.4,在工作磁性强度0〜36 mt内表现出良好的一致性,其最大相对误差将小于10%工作温度保持在25°C。

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