在不对称的障碍物阵列中使用主动尼马特拉切
Cody D Schimming1, C J O Reichhardt1, C Reichhardt1
1Theoretical Division and Center for Nonlinear Studies, <a href="https://ror.org/01e41cf67">Los Alamos National Laboratory</a>, Los Alamos, New Mexico 87545, USA.
Physical review. E
|July 18, 2024
概括
我们发现,不对称的障碍物会在活跃的敌体中产生方向流,这种现象被称为杆效应. 这种效应即使在动荡的活力敌体中也持续存在,并且取决于障碍物大小和缺陷动态.
科学领域:
- 软物质物理学 软物质物理学
- 非线性动力学是一种非线性动力学.
- 流体力学 流体力学 流体力学
背景情况:
- 活跃的体是具有自我推进的复杂流体.
- 不对称的结构可以诱导物理系统的定向运动.
- 拓缺陷在活性物质动态中起着至关重要的作用.
研究的目的:
- 为了研究2D主动阴性系统中单向流的出现 (杆效应).
- 探索不对称的周期性障碍对流体动力学和缺陷行为的影响.
- 了解障碍物几何,活动和新出现的流动模式之间的关系.
主要方法:
- 数字模拟一个二维的活跃敌人.
- 障碍物阵列不对称性和几何学的系统变化.
- 分析流体速度场和拓缺陷动态.
主要成果:
- 不对称的障碍物会产生杆效应,导致沿不对称轴的单向流体流动.
- 这种定向流在小障碍物间隙中保持在活跃的流状态下.
- 缺陷动力学从流量镜像转变为模糊式的行为,因为障碍物间隙减少,由于缺陷固定.
- 观察到杆效应大小与障碍物大小的非单调依赖,表明了最佳大小.
结论:
- 不对称的周期性障碍物有效地产生了活体体质中的定向运动.
- 障碍物几何,缺陷固定和活动之间的相互作用决定了杆效应的强度和特征.
- 这项研究提供了使用工程环境控制活性物质运输的见解.
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