WEAKLY NONLINEAR STABILITY ANALYSIS OF FLUVIAL DUNES BY THE USE OF THE MIXING LENGTH TURBULENT MODEL

• IZUMI Norihiro

  北海道大学大学院工学研究科

Bibliographic Information

Other Title

• 混合距離モデルを用いた河床デューンの弱非線形安定解析
• サス ガ ユウキ スル ギジ ダコウ ゲンショウ

Abstract

Weakly nonlinear stability analysis of fluvial dunes is performed with the use of the growth rate expansion method incorporated with the multiple scale parturbation technique. Open channel flow is modeled by the mixing length turbulent model. A series of perturbation equations are solved by the use of spectral collocation method with Chebyshev polynomial. The analysis reveals that the dune-flat bed transition is characterized by subcritical bifurcation when the resistant coefficient C^-1 is large.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 51 1021-1026, 2007

  Japan Society of Civil Engineers

Keywords

• dunes
• linear stability analysis
• nonlinear stabiliry analysis
• subcritical bifurcation
• mixing length hypothesis

Details

• CRID: 1390282680146520320
• NII Article ID: 130003842354
• NII Book ID: AN10426673
• ISSN: 18808751
• ISSN: 18849172
• ISSN: 09167374
• DOI: 10.2208/prohe.51.1021
• NDL BIB ID: 026352327
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026352327
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed