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| EFFECTS OF MASS TRANSFER ON THE THINNING AND RUPTURE OF A PLANE PARALLEL LIQUID FILM | |
| 引用本文： | 李佟茗. EFFECTS OF MASS TRANSFER ON THE THINNING AND RUPTURE OF A PLANE PARALLEL LIQUID FILM[J]. 中国化学工程学报, 1994, 2(3): 154-170 |
| 作者姓名： | 李佟茗 |
| 作者单位： | Li DongmingDepartment of Chemical Engineering，Tianjin University，Tianjin 300072，China |
| 基金项目： | Partially supported by National Natural Science Foundation of China |
| 摘 要： | The effects of mass transfer and physical properties upon the thinning and rupture of adraining plane parallel film are investigated.An equation is derived in which the thinning rate is afunction of bulk properties.surface properties(surface tension,surface viscosities,and the variationof surface tension with surface concentration),intermolecular forces(London-van der Waals forcesand electrostatic double layer forces),adsorption and surface diffusion coefficients,bubble size andfilm thickness.An estimation for the critical thickness at which a film rupture is carried out and thecoalescence time is obtained by integration to the critical thickness,The coalescence time is predictedas a function of bulk and surface properties,London-van der forces,adsorption and surfacediffusion coefficients,and bubble size. |
| 关 键 词： | bubble coalescence thin film drainage mass transfer effect on coalescence |
| 收稿时间： | 1993-06-01 |
| 修稿时间： | 1993-12-19 |
EFFECTS OF MASS TRANSFER ON THE THINNING AND RUPTURE OF A PLANE PARALLEL LIQUID FILM |
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| LI Dongming. EFFECTS OF MASS TRANSFER ON THE THINNING AND RUPTURE OF A PLANE PARALLEL LIQUID FILM[J]. Chinese Journal of Chemical Engineering, 1994, 2(3): 154-170 | |
| Authors: | LI Dongming |
| Affiliation: | Department of Chemical Engineering, Tianjin University, Tianjin 300072, China |
| Abstract: | The effects of mass transfer and physical properties upon the thinning and rupture of a draining plane parallel film are investigated. An equation is derived in which the thinning rate is a function of bulk properties, surface properties (surface tension, surface viscosities, and the variation of surface tension with surface concentration), intermolecular forces (London-van der Waals forces and electrostatic double layer forces), adsorption and surface diffusion coefficients, bubble size and film thickness. An estimation for the critical thickness at which a film rupture is carried out and the coalescence time is obtained by integration to the critical thickness. The coalescence time is predicted as a function of bulk and surface properties, London-van der Waals forces, adsorption and surface diffusion coefficients, and bubble size. |
| Keywords: | bubble coalescence thin film drainage mass transfer effect on coalescence |
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