The dynamic interaction of liquid droplets emerging from the gas diffusion layer surface is modeled to study the behavior of liquid water inside the gas channel of a polymer electrolyte membrane fuel cell with the volume of fluid (VOF) formulation. The surface contact angle of gas diffusion layer is varied as 45, 90, and 140 degrees. The air inlet velocity in the gas channel is varied as 5, 10, and 15 m/s. The water inlet velocity from micro pores is varied as 0.5, 1, and 2 m/s. As the contact angle increases, water coverage ratio increases. As the air inlet velocity and the water inlet velocity increase, water droplets move faster toward the channel exit as evidenced from the water front location plots. In summary, the hydrophobic wall contact angle and higher air/water inlet velocities provide better water removal characteristics.

Abstract
 1. 서론
 2. 연구 방법
  2.1 수치해석 모델
  2.2 경계 및 계산조건
 3. 결과 고찰 및 분석
  3.1 Contact angle의 영향
  3.2 Air inlet velocity의 영향
  3.3 Water inlet velocity의 영향
 4. 결론
 후기
 Reference

• 조재혁(공주대학교 대학원 기계공학과) | Jae Hyuk Jo
• 김우태(공주대학교 기계자동차공학부) | Woo Tae Kim Corresponding Author