Dual role of surfactant-producing reaction in immiscible viscous fingering evolution
Dual role of surfactant-producing reaction in immiscible viscous fingering evolution
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DOI：
10.1063/1.5066581
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发表时间：
2019-02
影响因子：
4.6
通讯作者：
Reiko Tsuzuki;T. Ban;Masanari Fujimura;Y. Nagatsu
中科院分区：
文献类型：
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作者：
Reiko Tsuzuki;T. Ban;Masanari Fujimura;Y. Nagatsu
描述了一种在径向Hele-Shaw槽中产生的表面活性剂降低界面张力的化学反应不混溶粘性指进（VF）的实验研究。表面活性剂在碱性溶液（氢氧化钠）和长链脂肪酸（亚油酸）之间的界面处形成。本课题与碱驱密切相关，碱驱是一种提高原油采收率的方法。该反应被发现有两个相反的影响VF取决于流速，即，变窄和变宽的手指。此外，根据反应对VF演化的影响以及最大观测区域指进的宽度和面积，将反应对VF演化的影响分为5种类型。每种类型的可能的机制，提出了一个参数的基础上缩放的VF属性，使用无量纲的数字给出了支持所提出的机制。这种反应在不混溶VF演化中的双重作用可能有助于建立碱驱的最佳条件。此外，发现一个化学反应有两个相反的效果对流动是从反应流动动力学的基础研究的观点的价值.不混溶粘性指进（VF）与化学反应的实验研究，其中一个表面活性剂在径向Hele-Shaw细胞中产生的结果，在界面张力的降低。表面活性剂在碱性溶液（氢氧化钠）和长链脂肪酸（亚油酸）之间的界面处形成。本课题与碱驱密切相关，碱驱是一种提高原油采收率的方法。该反应被发现有两个相反的影响VF取决于流速，即，变窄和变宽的手指。此外，根据反应对VF演化的影响以及最大观测区域指进的宽度和面积，将反应对VF演化的影响分为5种类型。每种类型的可能的机制，提出了一个参数的基础上缩放的VF属性，使用无量纲的数字给出了支持所提出的机制。这种双重作用的反应不混溶VF演变可能有助于…
An experimental study on immiscible viscous fingering (VF) with chemical reaction is described, whereby a surfactant produced in a radial Hele-Shaw cell results in a decrease in interfacial tension. The surfactant is formed at the interface between alkaline solution (sodium hydroxide) and a long-chain fatty acid (linoleic acid). This topic is closely related to alkaline flooding, which is an enhanced oil recovery method. The reaction was found to have two opposing effects on VF depending on the flow rate, namely, narrowing and widening of the fingers. Moreover, the influences of the reaction on VF evolution can be categorized into five different types based on the effects appearing in VF evolution and the fingering width and area at the maximum observation region. Possible mechanisms for each type are proposed, and an argument based on scaling of the VF properties using dimensionless numbers gives support to the proposed mechanisms. This dual role of the reaction in immiscible VF evolution may contribute to establishing optimal conditions for alkaline flooding. Moreover, the finding that one chemical reaction has two opposing effects on flow is of value from the standpoint of fundamental studies of reacting flow dynamics.An experimental study on immiscible viscous fingering (VF) with chemical reaction is described, whereby a surfactant produced in a radial Hele-Shaw cell results in a decrease in interfacial tension. The surfactant is formed at the interface between alkaline solution (sodium hydroxide) and a long-chain fatty acid (linoleic acid). This topic is closely related to alkaline flooding, which is an enhanced oil recovery method. The reaction was found to have two opposing effects on VF depending on the flow rate, namely, narrowing and widening of the fingers. Moreover, the influences of the reaction on VF evolution can be categorized into five different types based on the effects appearing in VF evolution and the fingering width and area at the maximum observation region. Possible mechanisms for each type are proposed, and an argument based on scaling of the VF properties using dimensionless numbers gives support to the proposed mechanisms. This dual role of the reaction in immiscible VF evolution may contribute ...