Falcon Eric, Laroche Claude, Fauve Stéphan
Laboratoire de Physique, Ecole Normale Supérieure de Lyon, UMR 5672, 46, allée d'Italie, 69 007 Lyon, France.
Phys Rev Lett. 2007 Mar 2;98(9):094503. doi: 10.1103/PhysRevLett.98.094503.
We report the observation of the crossover between gravity and capillary wave turbulence on the surface of mercury. The probability density functions of the turbulent wave height are found to be asymmetric and thus non-Gaussian. The surface wave height displays power-law spectra in both regimes. In the capillary region, the exponent is in fair agreement with weak turbulence theory. In the gravity region, it depends on the forcing parameters. This can be related to the finite size of the container. In addition, the scaling of those spectra with the mean energy flux is found in disagreement with weak turbulence theory for both regimes.
我们报告了在汞表面重力波与毛细波湍流之间交叉现象的观测结果。发现湍流波高的概率密度函数是不对称的，因此是非高斯的。在两种情况下，表面波高均显示出幂律谱。在毛细区域，指数与弱湍流理论相当吻合。在重力区域，它取决于强迫参数。这可能与容器的有限尺寸有关。此外，发现这两种情况下这些谱随平均能量通量的标度与弱湍流理论不一致。
