Phase transitions in anisotropic turbulence.

IF 2.7 2区 数学 Q1 MATHEMATICS, APPLIED
Chaos Pub Date : 2024-12-01 DOI:10.1063/5.0232179
Adrian van Kan
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引用次数: 0

Abstract

Turbulence is a widely observed state of fluid flows, characterized by complex, nonlinear interactions between motions across a broad spectrum of length and time scales. While turbulence is ubiquitous, from teacups to planetary atmospheres, oceans, and stars, its manifestations can vary considerably between different physical systems. For instance, three-dimensional turbulent flows display a forward energy cascade from large to small scales, while in two-dimensional turbulence, energy cascades from small to large scales. In a given physical system, a transition between such disparate regimes of turbulence can occur when a control parameter reaches a critical value. The behavior of flows close to such transition points, which separate qualitatively distinct phases of turbulence, has been found to be unexpectedly rich. Here, we survey recent findings on such transitions in highly anisotropic turbulent fluid flows, including turbulence in thin layers and under the influence of rapid rotation. We also review recent work on transitions induced by turbulent fluctuations, such as random reversals and transitions between large-scale vortices and jets, among others. The relevance of these results and their ramifications for future investigations are discussed.

各向异性湍流中的相变。
湍流是一种被广泛观测到的流体流动状态,其特点是在广泛的长度和时间尺度范围内,运动之间存在复杂的非线性相互作用。从茶杯到行星大气、海洋和恒星,湍流无处不在,但在不同的物理系统中,湍流的表现形式却大相径庭。例如,三维湍流显示出从大尺度到小尺度的前向能量级联,而在二维湍流中,能量则从小尺度到大尺度级联。在给定的物理系统中,当某个控制参数达到临界值时,湍流的这种不同状态之间就会发生转换。这种过渡点将湍流的不同阶段从定性上区分开来,在这种过渡点附近的流动行为被发现出乎意料地丰富。在此,我们将对高度各向异性湍流流体流中的此类转变进行最新研究,包括薄层中的湍流和快速旋转影响下的湍流。我们还回顾了有关湍流波动诱导的过渡的最新研究成果,如随机逆转以及大尺度涡旋和喷流之间的过渡等。讨论了这些结果的相关性及其对未来研究的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Chaos
Chaos 物理-物理:数学物理
CiteScore
5.20
自引率
13.80%
发文量
448
审稿时长
2.3 months
期刊介绍: Chaos: An Interdisciplinary Journal of Nonlinear Science is a peer-reviewed journal devoted to increasing the understanding of nonlinear phenomena and describing the manifestations in a manner comprehensible to researchers from a broad spectrum of disciplines.
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