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arXiv physics/0612254physics.flu-dyncond-mat.othernlin.CDphysics.class-ph
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波turbulence的不连续性观察

Observation of intermittency in wave turbulence

Eric Falcon, Stéphan Fauve, Claude Laroche

摘要:

本文报道了在水银表面重力-毛细波湍流中观测到的不稳定性。我们测量在一个给定的位置表面波振幅的时间波动。我们发现,形状的概率密度函数的局部斜率增量的表面波强烈的变化跨越时间尺度。相关的结构函数和平坦度被发现是幂律的时间尺度上超过十年。这些幂律的指数随着结构函数的阶数非线性地增加。所有这些观测结果都表明了波湍流中局部斜率增量的间歇性。我们讨论了这种不稳定性的可能起源。

英文摘要:

We report the observation of intermittency in gravity-capillary wave turbulence on the surface of mercury. We measure the temporal fluctuations of surface wave amplitude at a given location. We show that the shape of the probability density function of the local slope increments of the surface waves strongly changes across the time scales. The related structure functions and the flatness are found to be power laws of the time scale on more than one decade. The exponents of these power laws increase nonlinearly with the order of the structure function. All these observations show the intermittent nature of the increments of the local slope in wave turbulence. We discuss the possible origin of this intermittency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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