秩序从混乱中通过在流反应流系统中的连续相位过渡而出现的秩序
Sivakumar Sudarsanan1,2, Amitesh Roy3, Induja Pavithran1,2
1Department of Aerospace, <a href="https://ror.org/03v0r5n49">Indian Institute of Technology Madras</a>, Chennai 600 036, India.
Physical review. E
|July 18, 2024
概括
在动荡的反应流中,雷诺兹数的增加令人惊地导致了混乱的秩序. 这项研究揭示了一个连续的相位过渡与普遍的行为,类似于指导透.
科学领域:
- 复杂的系统复杂的系统.
- 流体动力学 流体动力学
- 非线性动力学是一种非线性动力学.
- 化学物理 化学物理
背景情况:
- 随着雷诺兹数的增加,动流体的流量从层状过渡到混乱,扩大时间和长度尺度.
- 在乱的反应性流中,雷诺兹数的增加可以悖论地导致声压波动中占主导地位的时间尺度和多分体性丧失.
- 在复杂的系统中,这种从混乱中产生秩序的现象是一个引人入胜的现象,需要进一步研究.
研究的目的:
- 实验性地研究一个动荡的反应流系统中,从混乱中产生秩序的过程.
- 分析火焰,声学和水力动力学子系统之间的非线性相互作用.
- 描述过渡的动态,并确定普遍的行为.
主要方法:
- 实验是在流反应流系统上进行的,该系统具有相互作用的火焰,声学和水力动力学子系统.
- 在时空领域研究了声场和火焰之间的短时间相关动态.
- 定义了一个表示相关动态的分数的顺序参数,并跟踪其演变.
主要成果:
- 顺序参数从零增加到一,表明顺序的逐渐出现.
- 敏感性,相关性长度和相关性时间在一个关键点上分离,表明连续的相位过渡.
- 实验证据证实,临界指数与定向透的普遍性类相一致.
结论:
- 在动荡的反应流中,从混乱中产生秩序的出现是一种连续的相位过渡.
- 该系统在临界点附近表现出通用行为,属于定向透通用性类.
- 这项研究证明了现实世界复杂,不平衡系统中的普遍关键现象.
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