湍流近平衡理论的一种新表述
A new formulation of the near-equilibrium theory of turbulence
AI总结:
提出一种离散方法的新表述,通过稠密晶格涡旋系统的特殊极限联系湍流与临界现象,产生间歇性和相干结构,但数值结果尚为定性。
摘要:
我们报告了关于三维湍流近平衡统计理论的一种离散方法的研究进展,该方法通过不再要求涡量场为离散涡丝并集的方式,推广了先前的工作。其核心思想是以一种能够揭示湍流与临界现象之间联系的方式,取稠密晶格涡旋系统的特殊极限。该方法产生的统计量具有湍流的基本特征,特别是间歇性和相干结构。数值计算尚未收敛,目前结果仅为定性。
英文摘要:
We present a status report on a discrete approach to the the near-equilibrium statistical theory of three-dimensional turbulence, which generalizes earlier work by no longer requiring that the vorticity field be a union of discrete vortex filaments. The idea is to take a special limit of a dense lattice vortex system, in a way that brings out a connection between turbulence and critical phenomena. The approach produces statistics with basic features of turbulence, in particular intermittency and coherent structures. The numerical calculations have not yet been brought to convergence, and at present the results are only qualitative.
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