Two-dimensional analysis on solid-liquid-phase flow in an open channel with a rubble mound groin

Kohji Michioku, Masashi Nanjo, Taisuke Ishigaki, Shiro Maeno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A two-dimensional numerical model was developed for describing the solid-liquid-phase flow in an open channel where a permeable rubble mound groin was installed. The computational domain in the analysis was divided into two regions, i.e. (1) a single-phase open channel flow and (2) a liquid-solid-phase flow consisting of an upper layer over the rubble mound groin and a porous media flow inside the groin. The whole domain was considered to have a two-layer structure with an interfacial boundary at the same level as the rubble mound's top surface. Momentum and mass exchange through the interface was taken into account by using the concept of entrainment velocity between the upper and lower layers. Numerical solutions for flow velocity and water depth were obtained not only outside but also inside the groin. In addition, the drag force in the rubble mound and the internal shear stress acting on the groin's top surface can be computed by the model. The analysis was verified through comparison with laboratory data, and good agreement between them was confirmed.

Original languageEnglish
Title of host publication31st IAHR Congress 2005
Subtitle of host publicationWater Engineering for the Future, Choices and Challenges
EditorsJun Byong-Ho, Il Lee Sang, Seo Il Won, Choi Gye-Woon
PublisherKorea Water Resources Association
Pages2870-2879
Number of pages10
ISBN (Electronic)8987898245, 9788987898247
Publication statusPublished - 2005
Event31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges - Seoul, Korea, Republic of
Duration: Sep 11 2005Sep 16 2005

Publication series

Name31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges

Conference

Conference31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges
CountryKorea, Republic of
CitySeoul
Period9/11/059/16/05

Keywords

  • Non-Darcian flow resistance
  • Permeable groin
  • Rubble mound
  • Two-dimensional analysis
  • Two-layer model

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Environmental Science (miscellaneous)
  • Water Science and Technology

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  • Cite this

    Michioku, K., Nanjo, M., Ishigaki, T., & Maeno, S. (2005). Two-dimensional analysis on solid-liquid-phase flow in an open channel with a rubble mound groin. In J. Byong-Ho, I. L. Sang, S. I. Won, & C. Gye-Woon (Eds.), 31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges (pp. 2870-2879). (31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges). Korea Water Resources Association.