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Dynamic Contact Ang...
Dynamic Contact Angle Modeling of Droplet Reattachment at the Gas Channel Wall in Polymer Electrolyte Fuel Cells
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- Andersson, M (författare)
- Lund University,Lunds universitet,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH
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- Beale, S.B. (författare)
- Queen's University at Kingston,Jülich Research Centre
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- Lehnert, W (författare)
- RWTH Aachen University,Jülich Research Centre,Jülich Aachen Research Alliance (JARA)
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(creator_code:org_t)
- Elsevier BV, 2019
- 2019
- Engelska 11 s.
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Ingår i: eTransportation. - : Elsevier BV. - 2590-1168. ; , s. 1-11
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Energy security, climate change and air pollution are all motivations for further development of fuel cells. Still, technical problems relating to water management, continue to hinder the marketability of polymer electrolyte fuel cells (PEFCs). The impact of dynamic contact angle (CA) boundary conditions, according to the Kistler model, is evaluated in this paper with the VOF approach, focusing on droplet reattachment at the gas channel wall. From this, it is clear that dynamic CA boundary conditions, compared to static CA boundary conditions, significantly influence the droplet reattachment characteristics, for example for the standard case with a gas velocity of 10 m/s, the first droplet awaits attachment to the channel wall on the side opposite the gas diffusion layer surface for a second droplet before merging and then moving out of the channel together, attached to the channel wall. The impact from dynamic CAs becomes even bigger for lower velocities (5 m/s in this case), where the droplet residence time increases significantly. It is clear that the channel dimensions, gas inlet velocity and value of CAs, as well as if a static or dynamic CA model is used, all have a significant impact on the droplet characteristics in PEFC GCs.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Dynamic contact angle
- Modeling
- Droplet reattachment
- Polymer electrolyte fuel cell
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- ref (ämneskategori)
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