NUMERICAL CALCULATION OF FLOWS BY A RUBBLE MOUND GROIN BY A COMBINED MODEL OF A POROUS FLOW MODEL WITH A NONDARCIAN RESISTANCE LAW AND A 3-DIMENSIONAL LES MODEL

• AKAHORI Ryosuke

  東京工業大学大学院

• MICHIOKU Kohji

  神戸大学大学院

Bibliographic Information

Other Title

• 非ダルシー型抵抗則を用いた捨石水制内部流れおよび3次元LESによる水制周辺流れの数値計算

Abstract

This study present a combined numerical model of a porous flow model that employ a non-Darcian resistance law and a 3-dimensional Large Eddy Simulation model in order to investigate 3-dimensional and temporal structures of flows around a rubble mound groin. A model's accuracy is cross-checked by comparing numerical results to observed results of an existing experiment, and model's results show good agreement in terms of time- and depth-averaged sense. Calculation results also imply that a permeable groin restricts growth of secondary flows in a constriction section. However, a combined model is not able to produce unsteady characteristics of flows that are caused by small scale and structured turbulences in a down-stream region of a groin.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 52 1045-1050, 2008

  Japan Society of Civil Engineers

Keywords

• open channel
• porous media
• non-Darcian
• rubble mound groin
• LES

Details

• CRID: 1390282680148618624
• NII Article ID: 130004043931
• DOI: 10.2208/prohe.52.1045
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed