论文标题
在凝结物存在下重力波的反向级联反应：数值模拟
Inverse cascade of gravity waves in the presence of condensate: numerical simulation
论文作者
论文摘要
在原始动力学方程框架中表面重力波的强制各向同性湍流的直接数值模拟中，观察到了通用的逆级联频谱。对于不同级别的泵送和非线性以及系统中存在的耗散，光谱的斜率相同（在误差的边缘）相同。在所有模拟中，反级联频谱的形成都伴随着强烈的长波背景（冷凝水）的出现。频谱$ \ sim k^{ - 3.07} $的观察到的斜率不同于波湍流理论$ \ sim k^{ - 23/6} $所预测的常数波动通量解决方案。
During the set of direct numerical simulations of the forced isotropic turbulence of surface gravity waves in the framework of primordial dynamical equations, the universal inverse cascade spectrum was observed. The slope of the spectrum is the same (in the margin of error) for different levels of pumping and nonlinearity as well as dissipation present in the system. In all simulation runs formation of the inverse cascade spectrum was accompanied by appearance of strong long wave background (condensate). The observed slope of the spectrum $\sim k^{-3.07}$ is different from the constant wave action flux solution predicted by the Theory of Wave Turbulence $\sim k^{-23/6}$.
