Influence of mass-transfer-induced Marangoni effects on magnitude of interfacial area and equipment performance in mass transfer operations

1973 ◽  
Vol 45 (18) ◽  
pp. 1114-1117 ◽  
Author(s):  
Henryk Sawistowski
Keyword(s):  
Mass Transfer ◽  
Interfacial Area ◽  
Marangoni Effects ◽  
Equipment Performance

Relationships Between Mass Transfer and Morphology in Deformable Complex Interfacial Systems

2002 ◽  
Author(s):  
A. El Afif ◽  
D. De Kee ◽  
R. Cortez ◽  
D. P. Gaver
Keyword(s):  
Mass Transfer ◽  
Mass Flux ◽  
Complex Fluids ◽  
Interfacial Area ◽  
Time Dependent ◽  
Internal Stresses ◽  
Order Tensor ◽  
Structural Variables ◽  
Interfacial Area Density ◽  
Isothermal Mass

We propose a model for isothermal mass transport into immiscible complex fluids. The interface is described by two, space and time dependent, structural variables: a scalar Q(r,t) denoting the interfacial area density and a traceless symmetric second order tensor q(r,t) accounting for the shape anisotropy. The mass flux expression includes new contributions attributed to the dynamical changes of the interface. The diffusion-morphology coupling is found to influence both the mass transfer and the dynamics of the interface. The former exhibits non-Fickian behavior while the latter undergoes interfacial deformations that affect both its size and shape, creating internal stresses at the same time.

Enhancement of Inter-Phase Transport in Mini/Micro-Scale Applications Using Passive Mixing

2011 ◽  
Author(s):  
Adam A. Donaldson ◽  
Patrick Plouffe ◽  
Arturo Macchi
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Scale Up ◽  
Interfacial Area ◽  
Flow Patterns ◽  
High Mass ◽  
Two Phase ◽  
Initial Flow ◽  
Micro Scale ◽  
Passive Mixing

Structured mini/micro-scale reactors continue to receive attention from both industry and academia due to their low pressure drop, high mass transfer rates and ease of scale-up when compared to conventional reactor technology. Commonly considered for heat and mass transfer limited reactions such as hydrogenations, hydrodesulphurization, oxidations and Fischer-Tropsch synthesis, the performance of these systems is highly dependent on mixing and the interfacial area between phases. While existing literature describes the initial flow patterns generated by a broad range of two-phase contactors, few studies explore the dynamic impacts of downstream passive mixing elements. Experimental and computational methodologies for characterizing two-phase flow pattern transitions, pressure drop, mixing and mass transfer are discussed, with relevant examples for serpentine and venturi-based passive mixing designs. The efficacy of these two configurations are explored in the context of pressure drop, conditions leading to significant interface renewal, and design considerations for optimizing mass transfer. Challenges associate with the characterization of multiphase flow through these systems are highlighted, and strategies suggested for both experimental and computational analysis of dynamic flow patterns and fluid-fluid interactions.

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