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| The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach | |
| Alternative Title | J. Colloid Interface Sci. |
| Li, XJ; Mao, ZS | |
| 2001-08-01 | |
| Source Publication | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| ISSN | 0021-9797 |
| Volume | 240Issue:1Pages:307-322 |
| Abstract | A numerical investigation of the flow field inside and around a deformed drop translating in another quiescent liquid contaminated by surfactant soluble in continuous phase but not soluble in dispersed phase is presented in this paper. The finite difference method was used to solve numerically the coupled Navier-Stokes and convective-diffusion equations in a body-fitted orthogonal coordinate system. The present numerical simulation of a two-fluid free-boundary problem was validated by comparison of the simulation results of a drop contaminated by surfactant at creeping flow with the analytical solution and the predicted rise velocity of a bubble contaminated by SDS with experimental data at the moderate Reynolds number. To evaluate the effect of surfactant on the drag coefficient, the steady motion of a drop of the same volume in the pure and contaminated systems was simulated. The behavior of the recirculating wake behind a contaminated drop was also examined and found that it becomes more closely attached to the rear stagnancy of the drop when the surfactant concentration is increase gradually. Finally, the stagnant-cap model was revisited and its defects and limitations were analyzed against numerical simulation. (C) 2001 Academic Press.; A numerical investigation of the flow field inside and around a deformed drop translating in another quiescent liquid contaminated by surfactant soluble in continuous phase but not soluble in dispersed phase is presented in this paper. The finite difference method was used to solve numerically the coupled Navier-Stokes and convective-diffusion equations in a body-fitted orthogonal coordinate system. The present numerical simulation of a two-fluid free-boundary problem was validated by comparison of the simulation results of a drop contaminated by surfactant at creeping flow with the analytical solution and the predicted rise velocity of a bubble contaminated by SDS with experimental data at the moderate Reynolds number. To evaluate the effect of surfactant on the drag coefficient, the steady motion of a drop of the same volume in the pure and contaminated systems was simulated. The behavior of the recirculating wake behind a contaminated drop was also examined and found that it becomes more closely attached to the rear stagnancy of the drop when the surfactant concentration is increase gradually. Finally, the stagnant-cap model was revisited and its defects and limitations were analyzed against numerical simulation. (C) 2001 Academic Press. |
| Keyword | Surfactant Mass Transfer Single Drop Drop Motion Stagnant Cap Model Interfacial Adsorption Numerical Simulation |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.1006/jcis.2001.7587 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | SPHERICAL BUBBLE ; FLOW PAST ; RETARDATION ; BEHAVIOR ; FILMS |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| WOS ID | WOS:000170111900036 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/5739 |
| Collection | 研究所（批量导入） |
| Affiliation | Chinese Acad Sci, Inst Chem Met, Beijing 100080, Peoples R China |
| Recommended Citation GB/T 7714 | Li, XJ,Mao, ZS. The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2001,240(1):307-322. |
| APA | Li, XJ,&Mao, ZS.(2001).The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach.JOURNAL OF COLLOID AND INTERFACE SCIENCE,240(1),307-322. |
| MLA | Li, XJ,et al."The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach".JOURNAL OF COLLOID AND INTERFACE SCIENCE 240.1(2001):307-322. |
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| The effect of surfac（219KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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