论文标题
表面重力波湍流中反级联反向级联的饱和
Saturation of the inverse cascade in surface gravity wave turbulence
论文作者
论文摘要
我们报告了比大盆地中强迫强度大的表面重力波湍流的观察。除了通常在重力波湍流中报道的低档转移外，还观察到高档转移，被解释为弱湍流理论的逆级联。当反相反的级联在强迫波长和盆地大小之间达到量表时，就可以实现稳定状态，但远离后者。这种取决于波浪陡度的逆级联饱和度可能是由于非线性耗散结构（例如尖锐的波浪）的出现。
We report on the observation of surface gravity wave turbulence at scales larger than the forcing ones in a large basin. In addition to the downscale transfer usually reported in gravity wave turbulence, an upscale transfer is observed, interpreted as the inverse cascade of weak turbulence theory. A steady state is achieved when the inverse cascade reaches a scale in between the forcing wavelength and the basin size, but far from the latter. This inverse cascade saturation, which depends on the wave steepness, is probably due to the emergence of nonlinear dissipative structures such as sharp-crested waves.
