Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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The Distribution of Chironomids by flow Mechanisms - Numerical Computation -

흐름 메카니즘에 의한 깔따구의 분포(II) - 수치계산 -

  • Lee, Sang-Ho (Department of Civil and Construction Engineering, Pukyung National University) ;
  • Lee, Jung-Min (Department of Civil and Construction Engineering, Pukyung National University) ;
  • Kim, Tae-Won (Department of Water Resources, Websolus Co., Ltd.) ;
  • Park, Jong-Pyo (Department of Water Resources, Websolus Co., Ltd.)
  • Received : 2005.10.25
  • Accepted : 2005.11.23
  • Published : 2006.01.30
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Abstract

Numerical simulation of turbulence flow in a circulating channel was performed. The RNG $k-\varepsilon$ model and Reynolds stress model of the FLUENT was used for evaluating the flow mechanisms. The simulation results were compared with the experimental data measured by a ADV (Acoustic Doppler Velocitmeter). The distribution of chironomids was analyzed by the computational results. They distributed at the region of lower velocities and lower turbulence intensity. In the case of a hemisphere structure being located on the straight section, chironomids lived in the upstream and downstream area of the hemisphere. The secondary currents also affected the distribution of chironomids. In conclusion, the computational fluid dynamic techniques can be inexpensively applied for analysing the relationship between flow characteristics and distribution of benthic macroinvertebrates.

Keywords

Acknowledgement

Grant : 생태-수리-전산학의 다학제 접근을 통한 오염하천의 통합적 친생태형 수질관리 모델개발

Supported by : 한국과학재단

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