振动板中波turbulence的观测
Observation of wave turbulence in vibrating plates
摘要：
波在被驱动介质中的非线性相互作用可能导致波湍流，这种状态使得能量从大尺度转移到小尺度。在这里，波湍流是在实验中观察到的振动板。板的法向速度的频率功率谱可以在单个曲线上重新标度，具有与D{ü}ring等人的弱湍流理论不相容的幂律行为。97，025503（2006）]。替代方案的建议，以解释这种差异-特别是在高频波破碎的发生。最后，速度增量的统计数据不显示间歇性行为。
英文摘要：
The nonlinear interaction of waves in a driven medium may lead to wave turbulence, a state such that energy is transferred from large to small lengthscales. Here, wave turbulence is observed in experiments on a vibrating plate. The frequency power spectra of the normal velocity of the plate may be rescaled on a single curve, with power-law behaviors that are incompatible with the weak turbulence theory of D{ü}ring et al. [Phys. Rev. Lett. 97, 025503 (2006)]. Alternative scenarios are suggested to account for this discrepancy -- in particular the occurrence of wave breaking at high frequencies. Finally, the statistics of velocity increments do not display an intermittent behavior.
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