デューン‐平坦床遷移に及ぼす圧力勾配の影響  [in Japanese] The effect of pressure gradient on the dune-flat bed transition  [in Japanese]

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Author(s)

Abstract

The effect of pressure gradient on the dune-flat bed transition is studied in terms of linear and weakly nonlinear stability analysis. We employ the Kovacs & Parker bedload transport formula extended to incorporate the effect of pressure gradient on the lee side of dunes proposed by Yamaguchi & Izumi.The linear anlysis reveals that the critical Froude number is slightly increased due to the effect of pressure gradient. The nonlinear stability analysis reveals that the effect of pressure gradient renders the bifurcation pattern at the dune-flat bed transition subcritical in the range of relatively large resistance coefficients.

Journal

  • Journal of applied mechanics

    Journal of applied mechanics 11, 851-857, 2008

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130004091300
  • NII NACSIS-CAT ID (NCID)
    AA11311063
  • Text Lang
    JPN
  • ISSN
    1345-9139
  • NDL Article ID
    9667534
  • NDL Source Classification
    ZM17(科学技術--科学技術一般--力学・応用力学)
  • NDL Call No.
    Z74-B339
  • Data Source
    NDL  J-STAGE 
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