Possibility of Inverse Energy Cascade in Two-Dimensional Quantum Turbulence
Possibility of Inverse Energy Cascade in Two-Dimensional Quantum Turbulence
复制标题
二维量子湍流中逆能量级联的可能性
DOI：
10.1007/s10909-009-9965-0
复制
发表时间：
2010
影响因子：
2
通讯作者：
M. Tsubota
中科院分区：
文献类型：
--
作者：
Ryu Numasato;M. Tsubota
本文采用Gross-Pitaevskii模型和涡点模型对二维量子湍流进行了数值研究。二维经典湍流一直被认为是地球物理现象的理想系统。这种湍流的惊人特征是逆能量级联，它将能量携带到低波数并激发大尺度运动。我们期望这些现象在二维量子湍流中出现，因为在三维湍流中我们知道经典和量子类似。然而，我们还没有证实二维量子湍流中的逆级联。本文给出了数值结果，并参照二维经典湍流的机制讨论了二维量子湍流不发生逆级联的原因。
We numerically study two-dimensional quantum turbulence by using the Gross-Pitaevskii model and the Vortex-Point model. Two-dimensional classical turbulence has long been investigated as an ideal system of geophysical phenomena. The amazing character of this turbulence is inverse energy cascade which carries energy toward low wavenumbers and excites large-scale motion. We expect these phenomena in two-dimensional quantum turbulence because in three-dimensional turbulence we know classical and quantum analogue. However, we have not yet confirmed inverse cascade in two-dimensional quantum turbulence. In this work, we show numerical results and discuss why inverse cascade does not occur in two-dimensional quantum turbulence by referring to the mechanism of two-dimensional classical turbulence.