Interaction between gas channels in water-saturated sands

IF 2.4 3区 物理与天体物理 Q1 Mathematics Physical review. E Pub Date : 2024-08-12 DOI:10.1103/physreve.110.024901
Germán Varas, Gabriel Ramos, Valérie Vidal
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Abstract

This work investigates the interaction between gas channels in a vertical Hele-Shaw cell when air is injected simultaneously from two points at a constant flow rate. Unlike single-injection experiments, this dual-point system induces the formation of numerous bubbles, thereby intensifying the interactions between air channels. We use an image analysis technique for tracking motion in the granular bed to define a flow density parameter throughout the cell. The vertical accumulation of this parameter (nz) reveals two specific heights, one marking a finger-to-fracture transition and another indicating the average interaction height of the air channels. Conversely, its horizontal accumulation (nx) assesses the extent of overlap in the fluidized zones created by each airflow. Notably, the analysis indicates that the optimum distribution of the three phases in the system is more closely related to the interaction's variability than its intensity. This finding is significant for industrial applications such as air sparging and catalytic reactors.

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水饱和砂中气体通道之间的相互作用
这项研究探讨了当空气以恒定流速从两点同时注入时,垂直海尔-肖电池中气体通道之间的相互作用。与单点注入实验不同,这种双点系统会诱发大量气泡的形成,从而加强气道之间的相互作用。我们利用图像分析技术跟踪颗粒床的运动,从而定义整个细胞的流动密度参数。该参数的垂直累积值(nz)显示了两个特定的高度,一个是指状到断裂的过渡高度,另一个是气道的平均相互作用高度。相反,其水平累积值(nx)可评估每股气流所形成的流化区的重叠程度。值得注意的是,分析表明,系统中三相的最佳分布与相互作用的可变性而非强度的关系更为密切。这一发现对于空气喷射和催化反应器等工业应用具有重要意义。
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来源期刊
Physical review. E
Physical review. E 物理-物理:流体与等离子体
CiteScore
4.60
自引率
16.70%
发文量
0
审稿时长
3.3 months
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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