抑制密集颗粒膜开放的压力值
Nabil Retailleau1, Yacine Khidas1, Florence Rouyer1
1Univ Gustave Eiffel, Ecole des Ponts, CNRS Navier UMR 8205, Marne-la-Vallée F-77454 France florence.rouyer@univ-eiffel.fr.
RSC advances
|October 23, 2023
概括
颗粒膜的稳定性对工业至关重要. 研究人员发现,液体压力控制着膜的开放,较低的压力导致堵塞状态,揭示了对颗粒物质行为的关键见解.
科学领域:
- 颗粒状材料的物理学 颗粒状材料的物理学
- 软物质物理学 软物质物理学
- 流体动力学 流体动力学
背景情况:
- 控制颗粒薄膜的稳定性对于材料生产,矿物回收和废水处理等工业过程至关重要.
- 由颗粒组成的颗粒薄膜用于各种应用,需要了解它们的机械性能.
研究的目的:
- 为了研究在受控液压下颗粒膜的打开动态.
- 识别不同的打开行为和影响它们的因素.
- 为了确定液体压力,粒子大小和薄膜稳定性之间的关系.
主要方法:
- 实验是在微米大小的颗粒制成的颗粒膜上进行的.
- 在电影的中心创建了一个洞,以启动打开.
- 膜内的液体压力被系统地控制和变化.
- 观察到的打开行为 (破裂,间歇,堵塞) 与压力相关分析.
主要成果:
- 颗粒膜的开放表现出不同的行为:完全破裂,间歇性开放,和一个卡住的状态.
- 液体压力被确定为这些行为之间的过渡的主要驱动因素.
- 较低的液体压力与塞状态的可能性增加相关.
- 观察到一个临界压力过渡,与表面张力和颗粒大小进行缩放.
结论:
- 该研究表明,颗粒膜的开放并不总是受到抑制,并且可以通过液体压力控制.
- 这些发现提供了对颗粒膜力学和稳定性的基本理解.
- 颗粒之间的薄膜内的自发洞不会导致整体薄膜失效.
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