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在蛇形通道中,状菌溶液流动的弹性不稳定性

Emily Y Chen¹, Sujit S Datta^1,2

¹Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA.

|May 29, 2025

概括

虫状菌 (WLM) 溶液在蛇形通道中表现出复杂的流动. 弹性不稳定性导致不稳定的3D流,形成停滞不前的死区和间歇性的扭曲,这对于工业应用至关重要.

科学领域:

风病学和流体动力学
软物质物理学软物质物理学
复杂的流体行为复杂的流体行为

背景情况:

虫状菌 (WLM) 解决方案在能源,环境和工业领域至关重要.
它们通过曲的道流动对于许多应用来说至关重要.
了解质-通道几何相互作用对于预测流动行为至关重要.

研究的目的:

通过实验可视化和量化在毫流体蛇形通道中半稀释WLM溶液的流量.
调查流体流体学和通道几何学对WLM流动行为的影响.
阐明流动不稳定性和复杂流动模式背后的机制.

主要方法:

试验可视化WLM溶液流在毫流体蛇形通道.
在不同流速下对流量行为的定量分析.
流动不稳定,死区和扭曲事件的表征.

主要成果:

在低流速下,观察到稳定的,带有不对称性和墙壁滑动的层状流.
超过临界流速诱导弹性不稳定性,导致不稳定的3D流.
关键特征包括持续的,波动的"死区"在曲和间歇的3D"扭曲"在散装流.
死亡区域和扭曲几何学与通过减少流线曲率来最大限度地减少弹性应力有关.

结论:

在WLM形学和曲通道几何学之间的相互作用显著影响流动行为.
弹性不稳定导致蛇形通道中复杂,不稳定的3D流动模式.
结果为预测和控制复杂环境中的WLM流提供了洞察力.

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