What is it about?

Flow channel surface wettability condition, including both static contact angle and sliding angle, has significant impact on the liquid transport processes on the surface, specifically the sliding angle influences considerably how the liquid is transported and how easy it is transported.

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Why is it important?

The flow channel dimension is very small in proton exchange membrane fuel cells, plus the high capillary effect of liquid water, makes the water removal challenging for such fuel cells; and surface dynamic wettability condition improves water transport and removal without substantial change to the existing flow channels in terms of the materials, design and manufacturing processes.


Sliding angle should be considered and implemented in the design and manufacturing of the flow channels in such fuel cells that can substantially improve the water removal capability, hence the cell performance.

Xianguo Li
University of Waterloo

Read the Original

This page is a summary of: Modeling of liquid water transport in a proton exchange membrane fuel cell gas flow channel with dynamic wettability, International Journal of Energy Research, April 2018, Wiley, DOI: 10.1002/er.4084.
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