Influence of a homogeneous axial magnetic field on Taylor–Couette flow of ferrofluids with low particle–particle interaction

Influence of a homogeneous axial magnetic field on Taylor–Couette flow of ferrofluids with low particle–particle interaction
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均匀轴向磁场对低粒子间相互作用铁磁流体泰勒库埃特流动的影响

DOI:
10.1007/s00348-010-0940-y
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发表时间:
2011
影响因子:
2.4
通讯作者:
S. Odenbach
S. Odenbach
中科院分区:
工程技术3区
文献类型:
--
作者:
M. Reindl;S. Odenbach

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给出了磁场作用下磁流体Couette流稳定性的实验结果。将Taylor-Couette系统的流体室置于均匀的轴向磁场中,用超声多谱勒测速仪测量了轴向流动的分布。研究发现,轴向磁场使Couette流趋于稳定。这种效果随着外圆柱体的旋转而减弱。此外,可以观察到,在较高的轴向磁场强度下,较低的轴向波数更稳定。由于所使用的磁流体表现出可忽略的粒子-粒子相互作用,因此所观察到的效应被认为完全基于自由粒子旋转的阻碍。
Experimental results concerning the stability of Couette flow of ferrofluids under magnetic field influence are presented. The fluid cell of the Taylor–Couette system is subject to a homogeneous axial magnetic field and the axial flow profiles are measured by ultrasound Doppler velocimetry. It has been found that an axial magnetic field stabilizes the Couette flow. This effect decreases with a rotating outer cylinder. Moreover, it could be observed that lower axial wave numbers are more stable at a higher axial magnetic field strength. Since the used ferrofluid shows a negligible particle–particle interaction, the observed effects are considered to be solely based on the hindrance of free particle rotation.
库埃特-泰勒流中的波数选择和埃克豪斯不稳定性
DOI: --
发表时间: 1986
期刊:
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