从Marangoni对流胞元到大尺度界面变形的动力学不稳定性

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从Marangoni对流胞元到大尺度界面变形的动力学不稳定性

石英¹; Kerstin Eckert²

¹ State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
² Institute for Aerospace Engineering, Technische Universität Dresden, D-01062 Dresden, Germany

收稿日期:2006-12-19 修回日期:1900-01-01 出版日期:2007-10-28 发布日期:2007-10-28
通讯作者: 石英

Orientation-dependent hydrodynamic instabilities from chemo-Marangoni cells to large scale interfacial deformations

SHI Ying¹; Kerstin Eckert²

¹ State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
² Institute for Aerospace Engineering, Technische Universität Dresden, D-01062 Dresden, Germany

Received:2006-12-19 Revised:1900-01-01 Online:2007-10-28 Published:2007-10-28
Contact: SHI Ying

摘要/Abstract

摘要： The interplay between chemistry and interfacial-tension-driven hydrodynamic instabilities has been studied experimentally. The system on hand consists of two immiscible liquids separated along an initially plane interface at which an interfacial reaction takes place to produce in situ a surfactant. It is identified that the dynamics of the system depends on the orientation of the Hele-Shaw cell with respect to the vector of gravity. If the Hele-Shaw cell is placed vertically, Marangoni cells with vigorous convection develop in both phases along a nearly planar interface. However, if the Hele-Shaw cell is tilted off the gravity, the instabilities in the system are characterized by the large scale interfacial deformation with a spatio-temporal periodicity together with the chemo-Marangoni convection. The focus is on the exploration of the transition from the cellular mode to the large scale interfacial deformation.

关键词: interfacial reaction;in situ produced surfactant;Marangoni convection;interfacial deformation

Abstract: The interplay between chemistry and interfacial-tension-driven hydrodynamic instabilities has been studied experimentally. The system on hand consists of two immiscible liquids separated along an initially plane interface at which an interfacial reaction takes place to produce in situ a surfactant. It is identified that the dynamics of the system depends on the orientation of the Hele-Shaw cell with respect to the vector of gravity. If the Hele-Shaw cell is placed vertically, Marangoni cells with vigorous convection develop in both phases along a nearly planar interface. However, if the Hele-Shaw cell is tilted off the gravity, the instabilities in the system are characterized by the large scale interfacial deformation with a spatio-temporal periodicity together with the chemo-Marangoni convection. The focus is on the exploration of the transition from the cellular mode to the large scale interfacial deformation.

Key words: interfacial reaction, in situ produced surfactant, Marangoni convection, interfacial deformation

石英, Kerstin Eckert. 从Marangoni对流胞元到大尺度界面变形的动力学不稳定性[J]. CIESC Journal.

SHI Ying, Kerstin Eckert. Orientation-dependent hydrodynamic instabilities from chemo-Marangoni cells to large scale interfacial deformations[J]. .

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从Marangoni对流胞元到大尺度界面变形的动力学不稳定性

Orientation-dependent hydrodynamic instabilities from chemo-Marangoni cells to large scale interfacial deformations

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