The anisotropy of the sound attenuation in magnetic fluid under an external magnetic field
The anisotropy of the sound attenuation in magnetic fluid under an external magnetic field
复制标题
外磁场作用下磁流体中声衰减的各向异性
DOI：
10.1143/jpsj.55.838
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发表时间：
1986
影响因子：
1.7
通讯作者：
S. Taketomi
中科院分区：
文献类型：
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作者：
S. Taketomi
外磁场作用下磁性流体的声衰减系数随磁场与声传播方向夹角φ的变化而变化。我们把这种各向异性的原因归结为两个运动的铁的胶体颗粒在流体中的集群。一个是它们的旋转运动，我们用液晶理论来分析，另一个是它们的平移运动，我们假设一个振动球在粘性流体中的模型来分析。该理论解释了衰减系数曲线在φ=0至φ=π/2范围内的两个峰值。
The sound attenuation coefficient of magnetic fluid under an external magnetic field varies with the angle φ between the field and the sound propagation. We attribute the cause of this anisotropy to the two motions of the clusters of the ferrous colloidal particles in the fluid. One is the rotational motion of them, which we analyze using liquid crystal theory, the other is the translational motion of them, which we analyze assuming the model of a vibrating sphere in viscous fluid. The theory interprets the two peaks of the attenuation coefficient curve ranging from φ=0 to φ=π/2.