Abstract
Experimental investigations were carried out to visualize the dynamic behavior (contact angle hysteresis and droplet shape) of liquid water droplets on carbon paper gas diffusion layers that are typically employed in proton exchange membrane fuel cells (PEMFCs). The experimental technique mimicks the generation of liquid water and formation of droplets in an air shear flow at the gas diffusion layer - gas flow channel interface of a simulated PEMFC cathode. Images obtained of growing liquid water droplets yield information on the contact angle hysteresis and droplet height, which were subsequently used to map droplet "instability" diagrams. These instability diagrams provide quantitative guidance on liquid water droplet removal at the gas diffusion layer/gas flow channel interface under the conditions of interest. The experimentally mapped droplet diagrams are compared with those predicted using a simplified model based on a macroscopic force balance and reasonably good agreement is obtained.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 |
| Editors | R.K. Shah, E.U. Ubong, S.S. Samuelsen |
| Pages | 65-69 |
| Number of pages | 5 |
| State | Published - Nov 21 2005 |
| Event | 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 - Ypsilanti, MI, United States Duration: May 23 2005 → May 25 2005 |
Publication series
| Name | Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 |
|---|
Other
| Other | 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 |
|---|---|
| Country | United States |
| City | Ypsilanti, MI |
| Period | 5/23/05 → 5/25/05 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
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Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface. / Hickner, Michael Anthony; Chen, Ken S.
Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005. ed. / R.K. Shah; E.U. Ubong; S.S. Samuelsen. 2005. p. 65-69 FUELCELL2005-74118 (Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface
AU - Hickner, Michael Anthony
AU - Chen, Ken S.
PY - 2005/11/21
Y1 - 2005/11/21
N2 - Experimental investigations were carried out to visualize the dynamic behavior (contact angle hysteresis and droplet shape) of liquid water droplets on carbon paper gas diffusion layers that are typically employed in proton exchange membrane fuel cells (PEMFCs). The experimental technique mimicks the generation of liquid water and formation of droplets in an air shear flow at the gas diffusion layer - gas flow channel interface of a simulated PEMFC cathode. Images obtained of growing liquid water droplets yield information on the contact angle hysteresis and droplet height, which were subsequently used to map droplet "instability" diagrams. These instability diagrams provide quantitative guidance on liquid water droplet removal at the gas diffusion layer/gas flow channel interface under the conditions of interest. The experimentally mapped droplet diagrams are compared with those predicted using a simplified model based on a macroscopic force balance and reasonably good agreement is obtained.
AB - Experimental investigations were carried out to visualize the dynamic behavior (contact angle hysteresis and droplet shape) of liquid water droplets on carbon paper gas diffusion layers that are typically employed in proton exchange membrane fuel cells (PEMFCs). The experimental technique mimicks the generation of liquid water and formation of droplets in an air shear flow at the gas diffusion layer - gas flow channel interface of a simulated PEMFC cathode. Images obtained of growing liquid water droplets yield information on the contact angle hysteresis and droplet height, which were subsequently used to map droplet "instability" diagrams. These instability diagrams provide quantitative guidance on liquid water droplet removal at the gas diffusion layer/gas flow channel interface under the conditions of interest. The experimentally mapped droplet diagrams are compared with those predicted using a simplified model based on a macroscopic force balance and reasonably good agreement is obtained.
UR - http://www.scopus.com/inward/record.url?scp=27744564837&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:27744564837
SN - 0791837645
T3 - Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
SP - 65
EP - 69
BT - Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
A2 - Shah, R.K.
A2 - Ubong, E.U.
A2 - Samuelsen, S.S.
ER -