International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Hessaraghatta, Hobli, Bangalore 560089, India.
Phys Rev E. 2019 Oct;100(4-1):043110. doi: 10.1103/PhysRevE.100.043110.
We investigate the Lagrangian statistics of three-dimensional rotating turbulent flows through direct numerical simulations. We find that the emergence of coherent vortical structures because of the Coriolis force leads to a suppression of the "flight-crash" events reported by Xu et al. [Proc. Natl. Acad. Sci. (USA) 111, 7558 (2014)PNASA60027-842410.1073/pnas.1321682111]. We perform systematic studies to trace the origins of this suppression in the emergent geometry of the flow and show why such a Lagrangian measure of irreversibility may fail in the presence of rotation.
我们通过直接数值模拟研究了三维旋转湍流的拉格朗日统计特性。我们发现，由于科里奥利力的作用而产生的相干涡旋结构导致了徐等人报道的“飞行-崩溃”事件的抑制。[Proc. Natl. Acad. Sci. (USA) 111, 7558 (2014)PNASA60027-842410.1073/pnas.1321682111]。我们进行了系统的研究，以追踪这种抑制现象在流动的新兴几何结构中的起源，并展示了为什么在存在旋转的情况下，这种拉格朗日不可逆性度量可能会失效。
