Visualization of Pollutant Dispersion over Hilly Terrain

산지 지형에서의 오염물질 확산에 관한 가시화 연구

  • 길태호 (포항공과대학교 기계공학과 대학원) ;
  • 이정묵 (포항공과대학교 기계공학과) ;
  • 이상준 (포항공과대학교 기계공학과)
  • Published : 2003.11.01


The wind flow and pollutant dispersion over a two-dimensional sinusoidal hilly obstacle with slope (the ratio of height to half width) of 0.7 have been investigated experimentally and numerically. Flow over a single sinusoidal hill model was visualized in a subsonic wind tunnel. The mean velocity profiles, turbulence statistics, and pollutant concentration distribution were measured at the Reynolds number based on the obstacle height (H=40mm) oft $2.6\times10^4$. Experimental results for flow over a flat ground were agreed with the theoretical and numerical results. When a pollutant source is located behind the hilly terrain, the pollutant dispersion appeared even in the upstream region due to recirculation flow.