研究目的
Investigating the anomalous surface oscillation in Faraday instability for a particular forcing frequency in one-dimensional cells filled with a mixture of water and glycerol.
研究成果
The research identified anomalous surface oscillations in Faraday instability for specific forcing frequencies, which are subharmonic and have a larger wavelength than predicted by linear stability analysis. These oscillations are robust and cannot be assimilated to solitary waves, suggesting a resonance effect with the cell's lateral dimensions.
研究不足
The study is limited to one-dimensional cells and a specific range of forcing frequencies (10 to 60 Hz). The anomalous mode is very sensitive to frequency noise and is not observed in annular containers or with highly viscous fluids.
1：Experimental Design and Method Selection:
The study involved experimental observation of Faraday instability in one-dimensional cells with varying forcing frequencies.
2：Sample Selection and Data Sources:
Three different rectangular cells filled with pure distilled water, different percentages of Glycerol in distilled water, and ethanol were used.
3：List of Experimental Equipment and Materials:
Rectangular cells made of Aluminium and Plexiglass, a mechanical vibration exciter B&K (model 4809), a HP function generator, a 300 W power hi-fi amplifier, a CCD camera, and a computer controlled frame grabber.
4：Experimental Procedures and Operational Workflow:
The cells were subjected to a range of forcing frequencies, and the surface waves were recorded and analyzed for wavelength and oscillation frequency.
5：Data Analysis Methods:
The recorded movies were processed to measure the wavelength and the temporal oscillation frequency of the Faraday instability.
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