NUMERICAL STUDY ON A SHALLOW WATER MODEL WITH LIGNOSA FROM LARGE-EDDY SIMULATION

Abstract

In a river, diffusion which is caused by horizontal shear has a great effbct on the environmental problem and in previous studies we made a shallow water flow equation including turbulent term on the basis of horizontal shear.In this study we propose a shallow water flow equation taking into accout Iignosa by using large eddy simulation theory and carried out experiments which types are high density, low density and middle density of lignosa. As results, in case of high density the water depth obtained by a equation including horizontal shear is more similar to the experimental results than a equation not including horizontal shear and in case of low density the water depth is consistent with the experimental results greatly by including horizontal shear.