This title appears in the Scientific Report :
2008
Please use the identifier:
http://dx.doi.org/10.1063/1.2946664 in citations.
Please use the identifier: http://hdl.handle.net/2128/17139 in citations.
Characterization of water exchange and two-phase flow in porous gas diffusion materials by hydrogen-deuterium contrast neutron radiography
Characterization of water exchange and two-phase flow in porous gas diffusion materials by hydrogen-deuterium contrast neutron radiography
Liquid water exchange in two-phase flows within hydrophobic porous gas diffusion materials of polymer electrolyte membrane fuel cells was investigated spatially resolved with H-D contrast neutron radiography. A commonly used one-phase model is sufficient to describe water exchange characteristics at...
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Personal Name(s): | Mahnke, I. |
---|---|
Hartnig, Ch. / Kardjilov, N. / Messerschmidt, M. / Hilger, A. / Strobl, M. / Lehnert, W. / Banhart, J. | |
Contributing Institute: |
Brennstoffzellen; IEF-3 |
Published in: | Applied physics letters, 92 (2008) |
Imprint: |
Melville, NY
American Institute of Physics
2008
|
DOI: |
10.1063/1.2946664 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Applied Physics Letters
92 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/17139 in citations.
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520 | |a Liquid water exchange in two-phase flows within hydrophobic porous gas diffusion materials of polymer electrolyte membrane fuel cells was investigated spatially resolved with H-D contrast neutron radiography. A commonly used one-phase model is sufficient to describe water exchange characteristics at low water production rates. At higher rates, however, a significantly higher exchange velocity is found than predicted by a simple model. A new model for the water transport is derived based on an eruptive mechanism guided by Haines jumps, which is supported by recent experimental findings and leads to a very good agreement with the experiments. (c) 2008 American Institute of Physics. | ||
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