论文标题
Kolmogorov和Kelvin Wave在量子湍流的广义模型中
Kolmogorov and Kelvin wave cascades in a generalized model for quantum turbulence
论文作者
论文摘要
我们通过使用广义的pitaevskii方程进行了衰减量子湍流的数值模拟，其中包括超出平均场校正和非局部相互作用潜力。选择非本地电位是为了模仿II，通过在激发光谱中引入最小值。我们观察到，在很大的尺度上，流的统计行为与相互作用电位无关，但是在比干预距离小的尺度下，在广义模型中增强了开尔文波级联的速度。在此范围内，不可压缩的动能光谱遵守开尔文波级联的弱波湍流预测，不仅在具有波数的缩放范围内，而且对于能量通量和干预量的距离。
We performed numerical simulations of decaying quantum turbulence by using a generalized Gross-Pitaevskii equation, that includes a beyond mean field correction and a nonlocal interaction potential. The nonlocal potential is chosen in order to mimic He II by introducing a roton minimum in the excitation spectrum. We observe that at large scales the statistical behavior of the flow is independent of the interaction potential, but at scales smaller than the intervortex distance a Kelvin wave cascade is enhanced in the generalized model. In this range, the incompressible kinetic energy spectrum obeys the weak wave turbulence prediction for Kelvin wave cascade not only for the scaling with wave numbers but also for the energy fluxes and the intervortex distance.
