Two-Phase Flow Dynamics in the Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells: Volume of Fluid Modeling and Comparison with Experiment
| Autor: | Jingtian Wu, Kui Jiao, Yun Wang, Zhiqiang Niu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Dynamics (mechanics) Flow (psychology) Proton exchange membrane fuel cell chemistry.chemical_element Thermodynamics 02 engineering and technology Condensed Matter Physics Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry 0202 electrical engineering electronic engineering information engineering Materials Chemistry Electrochemistry Volume of fluid method Two-phase flow Porosity Carbon |
| Zdroj: | Journal of The Electrochemical Society. 165:F613-F620 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/2.0261809jes |
| Popis: | Author(s): Niu, Z; Wang, Y; Jiao, K; Wu, J | Abstract: This paper proposes a three-dimensional (3D) volume of fluid (VOF) study to investigate two-phase flow in the gas diffusion layer (GDL) of proton exchange membrane (PEM) fuel cells and liquid water distribution. A stochastic model was adopted to reconstruct the 3D microstructures of Toray carbon papers and incorporate the experimentally-determined varying porosity. The VOF predictions were compared with the water profiles obtained by the X-ray tomographic microscopy (XTM) and the Leverett correlation. It was found local water profiles are similar in the sample’s sub-regions under the pressure difference p = 1000 Pa between the two GDL surfaces, but may vary significantly under p = 6000 Pa. The water-air interfaces inside the GDL structure were presented to show water distribution and breakthrough. |
| Databáze: | OpenAIRE |
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