Effects of Meteorological and Reclaiming Conditions on the Reduction of Suspended Particles

기상 조건과 매립 조건이 비산 먼지 발생에 미치는 영향

Choi, Jae-Won;Lee, Young-Su;Kim, Jae-Jin

  • Received : 2010.09.30
  • Accepted : 2010.11.24
  • Published : 2010.11.30


The effects of meteorological and reclaiming conditions on the reduction of suspended particles are investigated using a computational fluid dynamics (CFD) model with the k-$\varepsilon$ turbulence closure scheme based on the renormalization group (RNG) theory. Twelve numerical experiments with different meteorological and reclaiming conditions are performed. For identifying the meteorological characteristics of the target area and providing the inflow conditions of the CFD model, the observed data from the automatic weather station (AWS) near the target area is analyzed. Complicated flow patterns such as flow distortion, horse-shoe vortex, recirculation zone, and channeling flow appeared due to the topography and buildings in the domain. Specially, the flow characteristics around the reclamation area are affected by the reclaiming height, reclaiming size and windbreak height. Reclaiming height affected the wind speed above the reclaiming area. Windbreak induces more complicated flow patterns around the reclaiming area as well as within the reclaiming area. In front of the windbreak, flow is distorted as it impinges on the windbreak. As a result, upward flow is generated there. Behind the windbreak, a secondary circulation, so called, a recirculation zone is generated and flow is reattached at the end of the recirculation zone (reattachment point). At the lower part of the recirculation zone, there is a reverse flow toward the windbreak. Flow passing to the reattachment point starts to be recovered. Total amounts of suspended particles are calculated using the frictional and threshold frictional velocities, erosion potential function, and the number of surface disturbance. In the case of a 10 m-reclaiming and northerly wind, the amount of suspended particles is largest. In the presence of 5 m windbreak, the friction velocity above the reclaiming area is largely reduced. As a result, the total amount of the suspended particles largely decreases, compared to the case with the same reclaiming and meteorological conditions except for the windbreak The calculated suspended particle amounts are used as the emission rate of the dispersion model simulations and the dispersion characteristics of the suspended particles are analyzed.


Meteorological and reclaiming conditions;Wind break;Suspended particles


  1. 김재진, 2007, 장애물 외관비가 주변 흐름에 미치는 영향, 대기, 17, 381-391.
  2. 김현구, 2005, 기상조건별 비산먼지 관리체계 최적화 연구, 한국대기환경학회지, 21, 573-583.
  3. 김현구, 김민균, 김병억, 윤황영, 2005, 기상조건별 비산먼지 관리체계 최적화 연구, RIST 연구논문, 19, 21-31.
  4. 산업자원부, 2002, 석탄회를 이용한 성형제품의 저온제조 기술개발에 관한 연구, 00-A-AA01-A-08.
  5. 송창근, 김재진, 송동웅, 2007, 방풍벽에 의한 비산 먼지 저감 효과, 대기, 17, 315-326.
  6. Bohah, K. K., Alhinai, K. G., Alhinai, 1986, Field tests of porous fences in the regime of sand laden wind, Journal of Wind Engineering and Industrial Aerodynamics, 23, 309-319.
  7. Martin, P., 1995, Wind protective fences of PARAWEB composites, Techtextil-Symposium 1995, Lecture No. 537, 1-8.
  8. Park, C. W., Lee, S. J., 2003, Experimental study on surface pressure and flow structure around a triangular prism located behind a porous fence, Journal of Wind Engineering and Industrial Aerodynamics, 91, 165-184.
  9. Shao, Y., 2000, Physics and Modeling of Wind Erosion, Kluwer Academic Publishers, 393.
  10. Subhas, C., Yaragal, H. S., Govinda, R., Murthy, K. K., 1997, An experimental investigation of flow fields downstream of solid and porous fences, Journal of Wind Engineering and Industrial Aerodynamics, 66, 127-140.
  11. U.S. Environmental Protection Agency, 1995, Emission Factor Documentation for AP-42, Section 13.2.5., Industrial Wind Erosion, Research Triangle Park, NC, USA.
  12. Western Governor's Association, 2006, WRAP Fugitive Dust Handbook. Countess Environmental 4001 Whitesail Circle, 244.