在粗细粒界面的流化过程中出现周期性烟
Camille Porceillon1,2, Aurélien Gay1, Alfredo Taboada1
1Géosciences Montpellier, CNRS, Université de Montpellier, Université des Antilles, Place Eugène Bataillon, 34095 Montpellier, France.
Physical review. E
|February 20, 2026
概括
这项研究揭示了液体如何通过颗粒层流动,在接口上形成流化烟. 图案波长取决于尘埃大小和颗粒数量,影响颗粒物质的行为.
科学领域:
- 流体动力学 流体动力学
- 颗粒物理 颗粒物理
- 接口现象 接口现象
背景情况:
- 了解颗粒介质中的液体迁移对于各种工业和环境过程至关重要.
- 颗粒层之间的接口可以显著改变流动行为和粒子运输.
研究的目的:
- 为了研究接口对液体上升的影响,通过双层颗粒床上升.
- 描述在接口上出现的自我组织的流动模式,特别是流化烟.
主要方法:
- 实验室使用Hele-Shaw细胞填充粗细颗粒层进行实验.
- 以恒定的流量注入受控的水,以观察颗粒的迁移和化.
- 基于压力下降估计的模型开发,以预测模式特征.
主要成果:
- 在临界流速以上,粗粒微尘颗粒的化发生.
- 自组织的流化烟在有规律的空间分布的颗粒层之间的接口上形成.
- 一个预测模型成功估计了基于尘埃大小和颗粒数量的模式波长.
结论:
- 接口在调节颗粒床中的液体流动和粒子动态方面发挥着至关重要的作用.
- 流化烟的形成和间距是可预测的现象,受粒子特性和流量条件的支配.
- 这项研究提供了多层颗粒系统中接口运输机制的见解.
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