Journal of Institute of Convergence Technology (융복합기술연구소 논문집)

Institute of Convergence Technology (한국교통대학교 융복합기술연구소)
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Analysis of Flow Characteristics Behind an Edged Backward Facing Step

모서리진 후향 계단의 유동특성 분석

  • Han, Cheolheui (Department of Aeronautical and Mechanical Design Engineering, Korea National University of Transportation)
  • 한철희 (한국교통대학교 항공기계설계공학과)
  • Received : 2014.04.24
  • Accepted : 2014.05.16
  • Published : 2014.05.31
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Abstract

Investigation of flow characteristics behind a edged backward facing step is important for selecting appropriate positions of building constructions in the desert area. In the present study, the effect of edge angles on the flow characteristics is investigated using a commercial software CFD-ACE+. When the edge angle is less than 30 degree, reattachment length decreases, whereas when the edge angle is larger than 30 degrees, reattachment angle increases. It can be concluded that the flow patterns behind an edged backward facing step is classified as the two, streamlined and bluffed bodies. Appropriate edge angles have an effect of increasing the momentum toward the wall, which can reduce the reattachment length. It can be said that present results can be utilized for diverse industrial applications that includes the backward facing step.

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