通过直角截面单孔产生泡:歇斯底里行为和气泡体积分数的几何限制
Mattéo Clerget1,2, Alexandra Klimenko1,2, Maurice Bourrel2
1TotalEnergies S.E., Pôle d'Etude et de Recherches de Lacq, BP 47 Lacq 64170, France.
ACS omega
|February 26, 2024
概括
这项研究揭示了孔中的气体和液体流如何产生泡. 水力动力反限制了泡体积,这表明了在多孔介质中泡崩的新解释.
科学领域:
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 泡生产和破坏稳定在各种工业过程中至关重要.
- 了解在多孔介质中产生泡是控制泡行为的关键.
- 现有的模型通常将泡崩归因于泡凝聚.
研究的目的:
- 在单个矩形孔中研究泡的产生和不稳定机制.
- 确定控制泡生成和泡稳定性的关键因素.
- 探索水力动力反在泡行为和崩中的作用.
主要方法:
- 将气体和液体共同注入一个流量聚焦几何体 (单个矩形孔) 中.
- 使用恒定的气体压力 (Pg) 和恒定的水流量 (Qw).
- 采用简单的模型和数值方法来预测气体喷气的稳定性和压力下降.
主要成果:
- 泡的产生是通过在毛孔部的雷利-高原不稳定发生的.
- 在孔腔部发生的临界局部压力下降决定了稳定的气体流.
- 由于水力动力反,泡生成会表现出歇斯底里的行为.
- 通过几何学固定的最大气泡体积分数限制了泡的膨胀.
结论:
- 水力动力反,而不仅仅是凝聚,可以抑制泡生成,并导致多孔介质的崩.
- 这项研究为泡崩机制提供了新的视角.
- 几何限制在限制泡体积分数方面发挥着重要作用.
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