土木学会論文集B1(水工学)
Online ISSN : 2185-467X
ISSN-L : 2185-467X
水工学論文集第56巻
NONLINEAR STABILITY ANALYSIS OF SHALLOW OPEN-CHANNEL FLOW WITH LATERAL VELOCITY GRADIENTS
ADRIANO COUTINHO DE LIMANORIHIRO IZUMI
著者情報
ジャーナル フリー

2012 年 68 巻 4 号 p. I_79-I_84

詳細
抄録

The turbulent flow in a wide rectangular open-channel with lateral vegetation is studied by performing a weakly nonlinear stability analysis. The vegetation acts as a source of drag forces which provide resistance to the flow, such that there is an inflection point in the depth-averaged streamwise velocity. The generated instabilities may grow into discrete horizontal vortices centred at the edge of the vegetated region. The growth rate expansion method is applied with the multiple scale perturbation technique to the governing normalized Navier-Stokes equations. The small perturbation is added to a parameter related to the vegetation density.

著者関連情報
© 2012 Japan Society of Civil Engineers
前の記事 次の記事
feedback
Top