Decay of superfluid turbulence via Kelvin wave radiation and vortex reconnections
Decay of superfluid turbulence via Kelvin wave radiation and vortex reconnections
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通过开尔文波辐射和涡旋重联的超流体湍流衰减
DOI：
10.1103/physreva.67.015601
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Charles S. Adams
中科院分区：
文献类型：
--
作者：
M. Leadbeater;D. C. Samuels;C. Barenghi;Charles S. Adams
通过涡环碰撞的数值模拟，研究了超流湍流在低温极限下衰变的基本过程。我们发现，由重联产生的小涡环最终在碰撞中湮灭，它们的所有能量都转化为开尔文波和声音。我们发现，开尔文波的声发射也会导致涡旋线长度的损失，但这种耗散机制本身太小，不能解释实验观察到的衰减。
The elementary processes involved in the decay of superfluid turbulence in the limit of low temperature are studied by numerical simulations of vortex ring collisions. We find that small vortex rings produced by reconnections eventually annihilate in a collision where all their energy is converted into Kelvin waves and sound. We show that sound emission due to Kelvin waves also leads to a loss of vortex line length but this dissipation mechanism alone is too small to account for the experimentally observed decay.