E-245 開水路側岸部植生密度の変化が大規模水平渦と運動量輸送に及ぼす影響

概要

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A laboratory experiment was performed to know the relationship between the exchange of fluid momentum generated by organized horizontal vortices at the boundary of bank vegetaton and the main channel. It was found that the lateral momentum transport takes a peak value at a certain vegetation density which is much larger than the density of actual reed field. A series of numerical computations employing SDS&2DH turbulence model was performed by varying the vegetation density to identify the effect of the density on the lateral momentum transport. The model can predict the temporary-averaged flow field and the Rcynolds stress at the boundary of bank vegetation tairly well. By using the results of the experiments and the computation. a semi-empirical equation for relating the vegetation density and the lateral momentum transport was proposed.
日本流体力学会の論文
2003-07-28