Modeling and synchrotron imaging of droplet detachment in gas channels of polymer electrolyte fuel cells

M. Andersson; A. Mularczyk; A. Lamibrac; S.B. Beale; J. Eller; W. Lehnert; F.N. Büchi

doi:10.1016/j.jpowsour.2018.10.021

Modeling and synchrotron imaging of droplet detachment in gas channels of polymer electrolyte fuel cells

M. Andersson (Corresponding author)
, A. Mularczyk
, A. Lamibrac
, S.B. Beale
, J. Eller
, W. Lehnert
, F.N. Büchi

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

49 Citaten (Scopus)

Samenvatting

A computational fluid dynamics model of a channel (one liquid inlet, one liquid inlet and one two-phase outlet), applicable for PEFC gas channel water transport, is developed. A volume of fluid approach is used to study the two-phase flow behavior (interface-resolved) inside the gas channel, including the surface of GDL (gas diffusion layer), which is verified by experimental results from synchrotron based X-ray radiography and tomography imaging. A reasonably good agreement is found between the model and the measurements in terms of droplet dynamics, shape, and size. The channel height strongly influences the droplet transport behavior, with the droplet being attached to the GDL surface, as well as to the wall on the opposite side to the GDL at the same time for the shallowest channel (150 μm). The GDL contact angle influences the droplet size, with an increased GDL contact angle creating smaller droplets.

Originele taal-2	Engels
Pagina's (van-tot)	159-171
Aantal pagina's	13
Tijdschrift	Journal of Power Sources
Volume	404
DOI's	https://doi.org/10.1016/j.jpowsour.2018.10.021
Status	Gepubliceerd - 15 nov. 2018
Extern gepubliceerd	Ja

Bibliografische nota

Publisher Copyright:
© 2018 Elsevier B.V.

Financiering

Financial support for this work comes from the Swedish government ( VINNOVA ( 2015-01485 )) and the European Commission (Marie Curie Fellowship), as well as from Swiss National Science Foundation (SNSF project no. 407040 153790 and 200021 169913 ). Computing resources granted by JARA-HPC, under project jara0070, were used for the simulations.

Financiers	Financiernummer
European Commission
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	407040 153790, 200021 169913

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title = "Modeling and synchrotron imaging of droplet detachment in gas channels of polymer electrolyte fuel cells",

abstract = "A computational fluid dynamics model of a channel (one liquid inlet, one liquid inlet and one two-phase outlet), applicable for PEFC gas channel water transport, is developed. A volume of fluid approach is used to study the two-phase flow behavior (interface-resolved) inside the gas channel, including the surface of GDL (gas diffusion layer), which is verified by experimental results from synchrotron based X-ray radiography and tomography imaging. A reasonably good agreement is found between the model and the measurements in terms of droplet dynamics, shape, and size. The channel height strongly influences the droplet transport behavior, with the droplet being attached to the GDL surface, as well as to the wall on the opposite side to the GDL at the same time for the shallowest channel (150 μm). The GDL contact angle influences the droplet size, with an increased GDL contact angle creating smaller droplets.",

keywords = "Contact angle, GDL surface, Modeling, Polymer electrolyte fuel cells, Tomography imaging",

author = "M. Andersson and A. Mularczyk and A. Lamibrac and S.B. Beale and J. Eller and W. Lehnert and F.N. B{\"u}chi",

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year = "2018",

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doi = "10.1016/j.jpowsour.2018.10.021",

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T1 - Modeling and synchrotron imaging of droplet detachment in gas channels of polymer electrolyte fuel cells

AU - Andersson, M.

AU - Mularczyk, A.

AU - Lamibrac, A.

AU - Beale, S.B.

AU - Eller, J.

AU - Lehnert, W.

AU - Büchi, F.N.

PY - 2018/11/15

Y1 - 2018/11/15

N2 - A computational fluid dynamics model of a channel (one liquid inlet, one liquid inlet and one two-phase outlet), applicable for PEFC gas channel water transport, is developed. A volume of fluid approach is used to study the two-phase flow behavior (interface-resolved) inside the gas channel, including the surface of GDL (gas diffusion layer), which is verified by experimental results from synchrotron based X-ray radiography and tomography imaging. A reasonably good agreement is found between the model and the measurements in terms of droplet dynamics, shape, and size. The channel height strongly influences the droplet transport behavior, with the droplet being attached to the GDL surface, as well as to the wall on the opposite side to the GDL at the same time for the shallowest channel (150 μm). The GDL contact angle influences the droplet size, with an increased GDL contact angle creating smaller droplets.

AB - A computational fluid dynamics model of a channel (one liquid inlet, one liquid inlet and one two-phase outlet), applicable for PEFC gas channel water transport, is developed. A volume of fluid approach is used to study the two-phase flow behavior (interface-resolved) inside the gas channel, including the surface of GDL (gas diffusion layer), which is verified by experimental results from synchrotron based X-ray radiography and tomography imaging. A reasonably good agreement is found between the model and the measurements in terms of droplet dynamics, shape, and size. The channel height strongly influences the droplet transport behavior, with the droplet being attached to the GDL surface, as well as to the wall on the opposite side to the GDL at the same time for the shallowest channel (150 μm). The GDL contact angle influences the droplet size, with an increased GDL contact angle creating smaller droplets.

KW - Contact angle

KW - GDL surface

KW - Modeling

KW - Polymer electrolyte fuel cells

KW - Tomography imaging

UR - https://www.scopus.com/pages/publications/85055621634

U2 - 10.1016/j.jpowsour.2018.10.021

DO - 10.1016/j.jpowsour.2018.10.021

M3 - Article

AN - SCOPUS:85055621634

SN - 0378-7753

VL - 404

SP - 159

EP - 171

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Modeling and synchrotron imaging of droplet detachment in gas channels of polymer electrolyte fuel cells

Samenvatting

Bibliografische nota

Financiering

Duurzame ontwikkelingsdoelstellingen van de VN

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