Doppler Shift of Ripplon Spectrum Observed under Surface Flow
Doppler Shift of Ripplon Spectrum Observed under Surface Flow
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表面流下观测到的瑞波谱多普勒频移
DOI：
10.1143/jjap.40.l231
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发表时间：
2001
影响因子：
1.5
通讯作者：
K. Takagi
中科院分区：
文献类型：
--
作者：
M. Hosoda;K. Sakai;K. Takagi
我们利用光学跳动波纹光散射技术观察了流动液体表面的波纹光谱。由斯托克斯和反斯托克斯分量组成的波纹谱由于多普勒效应预计相对于中心频率是不对称的。在观察到的频谱中，这两个分量具有明显不同的峰值频率，并且该差异与理论计算预测的值非常吻合。该技术可应用于表面流速的非接触测量，为表面活性剂分子的动态吸附现象提供重要信息。还讨论了流速测量的灵敏度。
We observed the ripplon spectrum on the flowing liquid surface by the optical beating ripplon light scattering technique. The ripplon spectrum, which is composed of Stokes and anti-Stokes components, is expected to be asymmetric with respect to the center frequency due to the Doppler effect. In the observed spectrum, these two components have clearly different peak frequencies, and the difference agrees well with the value predicted from theoretical calculation. This technique can be applied to the noncontact measurement of the surface flow speed that provides important information on the dynamic adsorption phenomena of surfactant molecules. The sensitivity of the flow speed measurement was also discussed.