Kivotides D, Vassilicos J C, Samuels D C, Barenghi C F
Mathematics Department, University of Newcstle, United Kingdom.
Phys Rev Lett. 2001 Apr 2;86(14):3080-3. doi: 10.1103/PhysRevLett.86.3080.
We study numerically the interaction of four initial superfluid vortex rings in the absence of any dissipation or friction. We find evidence for a cascade of Kelvin waves generated by individual vortex reconnection events which transfers energy to higher and higher wave numbers k. After the vortex reconnections occur, the energy spectrum scales as k(-1) and the curvature spectrum becomes flat. These effects highlight the importance of Kelvin waves and reconnections in the transfer of energy within a turbulent vortex tangle.
我们对四个初始超流体涡环在无任何耗散或摩擦情况下的相互作用进行了数值研究。我们发现了由单个涡旋重连事件产生的开尔文波级联的证据，该级联将能量转移到越来越高的波数k。在涡旋重连发生后，能谱按k(-1)缩放，曲率谱变得平坦。这些效应突出了开尔文波和重连在湍流涡缠内能量转移中的重要性。
