Transient rise velocity and mass transfer of a single drop with interfacial instabilities-Numerical investigations

被引：48

作者：

Wegener, M. ^{[1
]}

Eppinger, T. ^{[1
]}

Baeumler, K. ^{[2
]}

Kraume, M. ^{[1
]}

Paschedag, A. R. ^{[3
]}

Baensch, E. ^{[1
]}

机构：

[1] Tech Univ Berlin, Chair Chem & Proc Engn, D-13355 Berlin, Germany

[2] Univ Erlangen Nurnberg, Chair Appl Math 3, D-91058 Erlangen, Germany

[3] Univ Appl Sci Berlin, Dept Mech Environm & Chem Engn, D-13353 Berlin, Germany

来源：

CHEMICAL ENGINEERING SCIENCE | 2009年 / 64卷 / 23期

关键词：

Marangoni convection; Mass transfer; Simulation; Drop; Extraction; SIMULATION; CONVECTION; TRANSPORT; BEHAVIOR; STEADY; FLOWS;

D O I：

10.1016/j.ces.2009.07.023

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Full 3D-simulations of transient interfacial mass transfer accompanied by Marangoni convection at a single spherical droplet in a quiescent liquid were performed in a moving reference coordinate system. The flow and concentration field are solved simultaneously. coupled via the additional Marangoni stress generated by concentration gradients at the interface. Fluid dynamics and mass transfer are investigated in the Marangoni convection dominated toluene/acetone/water system. The numerical results are qualitatively and quantitatively compared with own experimental results. The simulation results reveal that mass transfer is always enhanced-compared to calculations where no Marangoni convection appears-independently from the initial solute concentration. The enhancement factor of mass transfer ranges between 2 and 3. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：4835 / 4845

页数：11

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