Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

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 languageEnglish (US)
Title of host publicationProceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
EditorsR.K. Shah, E.U. Ubong, S.S. Samuelsen
Pages65-69
Number of pages5
StatePublished - Nov 21 2005
Event3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 - Ypsilanti, MI, United States
Duration: May 23 2005May 25 2005

Publication series

NameProceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005

Other

Other3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
CountryUnited States
CityYpsilanti, MI
Period5/23/055/25/05

Fingerprint

Diffusion in gases
Flow of gases
Liquids
Water
Proton exchange membrane fuel cells (PEMFC)
Contact angle
Hysteresis
Shear flow
Cathodes
Carbon
Air

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Hickner, M. A., & Chen, K. S. (2005). Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface. In R. K. Shah, E. U. Ubong, & S. S. Samuelsen (Eds.), Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 (pp. 65-69). [FUELCELL2005-74118] (Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005).
Hickner, Michael Anthony ; Chen, Ken S. / Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface. Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005. editor / R.K. Shah ; E.U. Ubong ; S.S. Samuelsen. 2005. pp. 65-69 (Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005).
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Hickner, MA & Chen, KS 2005, Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface. in RK Shah, EU Ubong & SS Samuelsen (eds), Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005., FUELCELL2005-74118, Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005, pp. 65-69, 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005, Ypsilanti, MI, United States, 5/23/05.

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 proceedingConference contribution

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T1 - Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface

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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.

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Hickner MA, Chen KS. Experimental studies of liquid water droplet growth and instability at the gas diffusion layer/gas flow channel interface. In Shah RK, Ubong EU, Samuelsen SS, editors, Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005. 2005. p. 65-69. FUELCELL2005-74118. (Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005).