Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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NUMERICAL SIMULATION OF DEBRIS FLOW USING MULTIPHASE AND NON-NEWTONIAN FLUID MODEL

비선형 점성유체의 다상유동 모형을 이용한 토석류 전산해석

  • Lee, S. (School of Civil Engineering, Chungbuk National University) ;
  • Hwnag, K.K. (Department of Civil System Engineering, Chungbuk National University)
  • 이승수 (충북대학교 토목공학부) ;
  • 황규관 (충북대학교 토목시스템공학과)
  • Received : 2017.01.05
  • Accepted : 2017.03.14
  • Published : 2017.03.31
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Abstract

Debris flow is a composition of solid objects of various sizes, suspension and water, which occurs frequently as the results of landslide following heavy rainfall. This often causes extensive damage in the form of socio-economic losses and casualties as witnessed during the incident around Mt. Umyeon, Seoul in 2011. There have been numerous investigation to mitigate the impacts from debris flow; however, the estimation as preparedness measure has not been successful due to nonlinear and multiphase characteristics of phenomena both in material and process inherent in the debris flow. This study presents a numerical approach to simulate the debris flow using open source code of computational fluid dynamics, OpenFOAM with non-Newtonian viscosity model for three phase material modeling. In order to validate the proposed numerical method, the quantitative evaluations were made by comparisons with experimental results and qualitative analysis for the dispersion characteristics was carried for the case of debris flow in the actual incident from Mt. Umyeon.

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References

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