Hallatschek K
Max-Planck Institut fur Plasmaphysik, EURATOM-IPP Association, D-85748 Garching, Germany.
Phys Rev Lett. 2000 May 29;84(22):5145-8. doi: 10.1103/PhysRevLett.84.5145.
In full flux-surface computer studies of tokamak edge turbulence, a spectrum of shear flows is found to control the turbulence level and not just the conventional (0,0)-mode flows. Flux tube domains too small for the large poloidal scale lengths of the continuous spectrum tend to overestimate the flows and thus underestimate the transport. It is shown analytically and numerically that under certain conditions dominant (0,0)-mode flows independent of the domain size develop, essentially through an analog of Bose-Einstein condensation for the shear flows.
在托卡马克边缘湍流的全通量面计算机研究中，发现一系列剪切流可控制湍流水平，而不仅仅是传统的（0,0）模流。对于连续谱的大极向尺度长度而言太小的通量管区域往往会高估流，从而低估输运。通过解析和数值方法表明，在某些条件下，会出现与区域大小无关的主导（0,0）模流，这本质上是通过剪切流的玻色 - 爱因斯坦凝聚类似物实现的。
