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Imaging and simulation-based analysis of evaporation flows over wetting edges

Raju, Suraj ; Braig, Felix ; Fricke, Mathis ; Gründing, Dirk ; Dörsam, Edgar ; Sauer, Hans Martin ; Bothe, Dieter (2024)
Imaging and simulation-based analysis of evaporation flows over wetting edges.
In: International Journal of Heat and Mass Transfer, 231
doi: 10.1016/j.ijheatmasstransfer.2024.125731
Article, Bibliographie

Abstract

We monitor the evaporation of a volatile liquid (ethanol) from an inkjet-printed liquid film, consisting of a mixture of ethanol and ethylene glycol. Interferometric video imaging technology is used for recording 2D vapor concentration profiles over the evaporating film. The vapor flow is reconstructed using numerical simulations. In this way, we reconstruct the complete flow velocity profile, and distinguish diffusive and convective gas transport, with quantitative tracking of the transport balances. The convective flows are driven by the buoyancy of the solvent vapor in the ambient air. In particular, we reconstruct the evaporation process from the interface of the two-component liquid. We monitor the evaporation flows, implement Raoult’s and Henry’s laws of vapor pressure reduction, as well as evaporation resistivity. We observe the edge-enhancement of evaporation flows at the wetting rims of the liquid film, and decompose the vapor flows in the diffusive and the convective contribution. We demonstrate how Langmuir’s evaporation resistivity can be identified using vapor pressure profiles in the gas phase data and mass transfer balances.

Item Type: Article
Erschienen: 2024
Creators: Raju, Suraj ; Braig, Felix ; Fricke, Mathis ; Gründing, Dirk ; Dörsam, Edgar ; Sauer, Hans Martin ; Bothe, Dieter
Type of entry: Bibliographie
Title: Imaging and simulation-based analysis of evaporation flows over wetting edges
Language: English
Date: 2024
Publisher: Elsevier
Journal or Publication Title: International Journal of Heat and Mass Transfer
Volume of the journal: 231
DOI: 10.1016/j.ijheatmasstransfer.2024.125731
URL / URN: https://www.sciencedirect.com/science/article/pii/S001793102...
Abstract:

We monitor the evaporation of a volatile liquid (ethanol) from an inkjet-printed liquid film, consisting of a mixture of ethanol and ethylene glycol. Interferometric video imaging technology is used for recording 2D vapor concentration profiles over the evaporating film. The vapor flow is reconstructed using numerical simulations. In this way, we reconstruct the complete flow velocity profile, and distinguish diffusive and convective gas transport, with quantitative tracking of the transport balances. The convective flows are driven by the buoyancy of the solvent vapor in the ambient air. In particular, we reconstruct the evaporation process from the interface of the two-component liquid. We monitor the evaporation flows, implement Raoult’s and Henry’s laws of vapor pressure reduction, as well as evaporation resistivity. We observe the edge-enhancement of evaporation flows at the wetting rims of the liquid film, and decompose the vapor flows in the diffusive and the convective contribution. We demonstrate how Langmuir’s evaporation resistivity can be identified using vapor pressure profiles in the gas phase data and mass transfer balances.

Uncontrolled Keywords: film evaporation, buoyancy driven flow, evaporation resistance, Henry’s law, chemical potential, OpenFOAM, Michelson interferometry
Identification Number: Artikel-ID: 125731
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute of Printing Science and Technology (IDD)
DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1194: Interaction between Transport and Wetting Processes
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1194: Interaction between Transport and Wetting Processes > Research Area B: Modeling and Simulation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1194: Interaction between Transport and Wetting Processes > Research Area B: Modeling and Simulation > B01: Modelling and VOF based Simulation of the Multiphysics of Irreversible Thermodynamic Transfer Processes at Dynamic Contact Lines
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1194: Interaction between Transport and Wetting Processes > Research Area C: New and Improved Applications
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1194: Interaction between Transport and Wetting Processes > Research Area C: New and Improved Applications > C01: Forced Wetting with Hydrodynamic Assist on Gravure Print Cylinders
04 Department of Mathematics
04 Department of Mathematics > Mathematical Modelling and Analysis
Date Deposited: 10 Jun 2024 05:49
Last Modified: 10 Jun 2024 08:15
PPN: 51900017X
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