Numerical simulations of liquid water droplets interacting with gas channel walls in a polymer electrolyte membrane fuel cell are performed with the volume of fluid (VOF) method. To investigate the effect of channel wall wettability, the contact angles of gas diffusion layer (GDL) and the side/top walls are varied as 45, 90, and 140 degrees. Two different water injection inlet locations are selected to investigate the interactions of liquid water with the different gas channel walls. As the GDL contact angle increases, the GDL surface water coverage ratio and the water volume ratio decrease. When the water injection hole is located near the side wall, the GDL surface water coverage ratio decreases and the water volume ratio increases as the contact angle of the side and top walls decreases. In conclusion, the GDL surface water coverage ratio and the water volume ratio may compete with each other to determine the fuel cell performance.

1. 서 론
 2. 연구 방법
  2.1 수치해석 모델
  2.2 계산 조건
 3. 결과 및 토의
  3.1 GDL 접촉각의 영향
  3.2 가스채널 옆면/윗면 접촉각의 영향
 4. 결 론
 후 기
 References

• 김선우(공주대학교 대학원 기계공학과) | Sun Woo Kim
• 김우태(공주대학교 기계자동차공학부) | Woo Tae Kim