空气入侵三维泡会导致粘性指纹不稳定
Young H Lee1, Jingyi Wang1, Ranjani Kannaiyan1
1Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, Canada.
Scientific reports
|February 5, 2024
概括
这项研究揭示了在Hele-Shaw细胞中将空气注入3D泡时的三种不同的流动模式. 空气指宽度尺度与所有模式的注入压力,提供了多相流动力学的洞察力.
科学领域:
- 流体动力学 流体动力学
- 泡物理学的泡物理
- 多相流程 多相流程
背景情况:
- 了解多孔介质中不可混合的位移对于各种工业应用至关重要.
- 在Hele-Shaw细胞中的泡移位动态为复杂的多孔介质流提供了一个简化但有洞察力的模型.
研究的目的:
- 在Hele-Shaw细胞中实验研究3D泡与空气的辐射位移.
- 识别和描述不同的流动模式及其控制的物理机制.
主要方法:
- 利用Hele-Shaw细胞创建一个受控的2D封锁,用于3D泡实验.
- 在不同的注射压力和速度下对空气入侵泡进行实验调查.
- 分析了流动模式,确定了不同的模式,并测量了相关参数,如指尖速度和空气注入压力.
主要成果:
- 确定了三种不同的流动模式:在低速度时具有墙面滑动的插头流动,在更高速度时在泡层内进行插头流动,以及在高压时通过通道进行气指发展.
- 在初始状态下发现了空气注入压力和指尖速度 (指数 2/3) 之间的功率定律关系.
- 观察到空气指宽度随着空气注入压力不断变大,独立于流量.
结论:
- 该研究阐明了泡位移中的流动模式,速度和压力之间的复杂相互作用.
- 观察到的空气指宽度与注入压力的缩放提供了泡入侵过程的关键预测关系.
- 这些发现有助于对多相流在多孔介质中的基本理解,这与增强的石油回收和二氧化碳封存有关.
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