Abstract The interactions of the bubbles in a loosely packed bubbly flow in a high viscous fluid approaching a pore space are studied using a shadowgraph imaging technique. The motion of the bubbles has been evaluated by considering shape analysis of their deformation and the variation in the velocity and pressure distribution of the phase. A comparison of two cases of a linear array and a matrix of bubbles emphasizes the importance of the arrangement on the deformation and motion of the dispersed phase in the pore space. The deformation of the bubbles in both cases results in a deceleration and acceleration process of the dispersed phase in the pore region. This process was a function of size, number of the bubbles competing in the pore throat and the arrangement of the competing bubbles. The variation in the motion of the dispersed phase will ultimately lead to different flow motion and phenomena at the entrance of the pore throat. The results also highlight that although bubbles had different motion approaching the pore throat, they follow similar deformation transition as they enter and exit the pore throat. This work contributes to existing knowledge of multi-phase flow in pore space by providing further understanding the effect of the interaction of phases based on the arrangement and their motion in a porous geometry. Graphic abstract

中文翻译：

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通过孔隙空间的松散填充气泡流的相互作用

摘要 使用阴影图成像技术研究了接近孔隙空间的高粘性流体中松散填充气泡流中气泡的相互作用。通过考虑气泡变形的形状分析以及相的速度和压力分布的变化来评估气泡的运动。线阵和气泡矩阵两种情况的比较强调了排列对分散相在孔隙空间中变形和运动的重要性。两种情况下气泡的变形都会导致孔隙区域中分散相的减速和加速过程。这个过程是大小、孔喉中竞争气泡数量和竞争气泡排列的函数。分散相运动的变化最终会导致孔喉入口处出现不同的流动运动和现象。结果还强调，尽管气泡在接近孔喉时有不同的运动，但它们在进入和离开孔喉时遵循相似的变形转变。这项工作通过进一步了解基于多孔几何结构中的相的排列和运动的相互作用的影响，有助于对孔隙空间中多相流的现有知识做出贡献。图形摘要 这项工作通过进一步了解基于多孔几何结构中的相的排列和运动的相互作用的影响，有助于对孔隙空间中多相流的现有知识做出贡献。图形摘要 这项工作通过进一步了解基于多孔几何结构中的相的排列和运动的相互作用的影响，有助于对孔隙空间中多相流的现有知识做出贡献。图形摘要