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A hydrodynamic analogy based modelling approach for zero-gravity distillation with metal foams

Rieks, Sebastian and Wende, Marc and Preußer, Niklas and Gambaryan-Roisman, Tatiana and Kenig, Eugeny Y. (2019):
A hydrodynamic analogy based modelling approach for zero-gravity distillation with metal foams.
In: Chemical Engineering Research and Design, Elsevier, pp. 615-623, 147, ISSN 02638762,
DOI: 10.1016/j.cherd.2019.05.022,
[Online-Edition: http://www.sciencedirect.com/science/article/pii/S0263876219...],
[Article]

Abstract

Zero-gravity distillation (ZGD) is one of the few ways to establish a small-scale distillation process. In contrast to conventional distillation columns, capillary forces, e.g. induced by metal foams, are exploited to ensure liquid flow in ZGD units. In order to strengthen the knowledge basis necessary for the ZGD equipment design, understanding of the relevant transport phenomena is necessary. In this work, a model for the description of ZGD processes was developed. It includes momentum, heat and species transport in both liquid and vapour phases. Evaporation and condensation influence on momentum transfer is captured in a simplified manner, allowing an approximate local flow velocity determination. The developed model was implemented in the OpenFOAM® software and used to numerically simulate methanol/ethanol distillation processes in 2D approximation. In particular, the model was applied to investigate the influence of the metal foam porosity and thickness as well as the length of the foam-free compartment on the velocity, temperature and mass fraction distributions.

Item Type: Article
Erschienen: 2019
Creators: Rieks, Sebastian and Wende, Marc and Preußer, Niklas and Gambaryan-Roisman, Tatiana and Kenig, Eugeny Y.
Title: A hydrodynamic analogy based modelling approach for zero-gravity distillation with metal foams
Language: English
Abstract:

Zero-gravity distillation (ZGD) is one of the few ways to establish a small-scale distillation process. In contrast to conventional distillation columns, capillary forces, e.g. induced by metal foams, are exploited to ensure liquid flow in ZGD units. In order to strengthen the knowledge basis necessary for the ZGD equipment design, understanding of the relevant transport phenomena is necessary. In this work, a model for the description of ZGD processes was developed. It includes momentum, heat and species transport in both liquid and vapour phases. Evaporation and condensation influence on momentum transfer is captured in a simplified manner, allowing an approximate local flow velocity determination. The developed model was implemented in the OpenFOAM® software and used to numerically simulate methanol/ethanol distillation processes in 2D approximation. In particular, the model was applied to investigate the influence of the metal foam porosity and thickness as well as the length of the foam-free compartment on the velocity, temperature and mass fraction distributions.

Journal or Publication Title: Chemical Engineering Research and Design
Volume: 147
Publisher: Elsevier
Uncontrolled Keywords: Zero-gravity distillation, Metal foams, Hydrodynamic analogy, Coupled transport phenomena
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD) > Interfacial Transport & Complex Wetting
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
Date Deposited: 05 Aug 2019 08:45
DOI: 10.1016/j.cherd.2019.05.022
Official URL: http://www.sciencedirect.com/science/article/pii/S0263876219...
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