Schwabe M, Zhdanov S, Räth C
Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 82234 Weßling, Germany.
Phys Rev E. 2017 Apr;95(4-1):041201. doi: 10.1103/PhysRevE.95.041201. Epub 2017 Apr 10.
We study a complex plasma under microgravity conditions that is first stabilized with an oscillating electric field. Once the stabilization is stopped, the so-called heartbeat instability develops. We study how the kinetic energy spectrum changes during and after the onset of the instability and compare with the double cascade predicted by Kraichnan and Leith for two-dimensional turbulence. The onset of the instability manifests clearly in the ratio of the reduced rates of cascade of energy and enstrophy and in the power-law exponents of the energy spectra.
我们研究了在微重力条件下的复杂等离子体，该等离子体首先通过振荡电场进行稳定。一旦稳定过程停止，就会出现所谓的心跳不稳定性。我们研究了在不稳定性开始期间和之后动能谱如何变化，并与Kraichnan和Leith针对二维湍流预测的双级联进行比较。不稳定性的开始在能量和涡量级联的降低速率之比以及能谱的幂律指数中表现得很明显。
