流动相互作用导致自我组织的飞行形成,被自我放大波浪破坏
Joel W Newbolt1, Nickolas Lewis1, Mathilde Bleu1
1New York University, Courant Institute, Applied Math Lab, New York, USA.
Nature communications
|April 24, 2024
概括
像鱼群和鸟群这样的动物集体表现出新兴的行为. 机器人实验揭示了流动相互作用可以创造秩序,但也会造成不稳定,变性稳定较大的群体.
科学领域:
- 集体动物行为 集体动物行为
- 流体动力学 流体动力学
- 机器人技术 机器人技术 机器人技术
背景情况:
- 动物的集体运动经常与物质状态相比较,群体现象是从个体相互作用中产生的.
- 粘性惯性流是鱼群和鸟群中物理相互作用的关键媒介.
- 了解这些流媒体相互作用对于解释集体运动模式至关重要.
研究的目的:
- 调查粘性惯性流在集体移动动物群体内的调解相互作用中的作用.
- 探索双向流动相互作用如何影响"模拟群"中的排列和稳定性.
- 在流媒体集体中识别自我排序和干扰放大机制.
主要方法:
- 使用机器人实验,在前进飞行中挥舞翅膀来模拟"模拟群".
- 进行力测量和应用扰动来分析唤醒相互作用.
- 开发一个唤醒相互作用模型,结合类似弹的力量和共振级.
主要成果:
- 双流相互作用促进晶体或格子状的安排,但秩序被不断增长的位置波破坏.
- 较大的群体表现出流动诱导的振荡模式 ("flonons"),放大并引起碰撞.
- 引入个体变异性可以通过抑制flonon放大来稳定较大的群体.
结论:
- 集体中的自我秩序是由类似弹的力量介导的,而干扰放大则通过共振级联发生.
- 流动诱导的振荡模式 ("flonons") 是集体不稳定的关键因素.
- 个体之间的变化可以通过破坏共振和促进位置障碍来稳定大集体.
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