The Magnetoviscous Effect of a Biocompatible Ferrofluid at High Shear Rates
The Magnetoviscous Effect of a Biocompatible Ferrofluid at High Shear Rates
复制标题
高剪切速率下生物相容性铁磁流体的磁粘效应
DOI：
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发表时间：
2014
影响因子：
2.1
通讯作者：
S. Odenbach
中科院分区：
文献类型：
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作者：
J. Nowak;E. Dohmen;S. Odenbach
铁磁流体在生物医学领域中的重要性日益增加，导致需要详细了解流体的流动行为，特别是在这些应用中使用的外部磁场的影响下。它已被证明，在这方面使用的生物相容性铁磁流体表现出较强的磁粘效应-粘度上升，如果施加外部磁场-低剪切速率和相对较弱的磁场。然而，在大多数潜在的应用在生物医学方面，铁磁流体将暴露于高剪切速率和强磁场。因此，在这种条件下表征流体并测量几种磁场强度和高剪切速率下的粘度以实现流动行为的准确预测并因此实现有效和安全的应用是特别感兴趣的。
Ferrofluids receive growing importance in the biomedical area, leading to the requirement of a detailed understanding of the flow behavior of the fluids, especially under the influence of external magnetic fields as used in those applications. It has been shown that biocompatible ferrofluids used in this regard show a strong magnetoviscous effect-a rise of viscosity, if an external magnetic field is applied-for low shear rates and comparatively weak magnetic fields. Nevertheless, in most of the potential applications in the biomedical context, the ferrofluids will be exposed to high shear rates and strong magnetic fields. Therefore, it is of special interest to characterize the fluids under such conditions and to measure the viscosity for several magnetic field strengths and for high shear rates to enable exact predictions of the flow behavior and therefore enabling an effective and safe application.