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contributor authorJiun-Huei Jang
contributor authorHsin-ya Ho
contributor authorChin-lien Yen
date accessioned2017-05-08T21:51:06Z
date available2017-05-08T21:51:06Z
date copyrightSeptember 2011
date issued2011
identifier other%28asce%29hy%2E1943-7900%2E0000428.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/64249
description abstractIn bed-load sediment transport, the lifting force plays an important role in reducing the friction between sediment particles and the bed surface, and it makes particle transportation by the shear force easier. Because the lifting force is related to vorticity, a three-dimensional (3D) numerical model incorporating large eddy simulations was applied to simulate the vorticity field in a channel bend. The results show that the distribution of vorticity is highly nonuniform, and it can lead to significant variations in lifting force and bed-load sediment transport per unit width in a channel bend. Relevant theories are modified on the basis of physical reasoning and then incorporated into numerical models to investigate the lifting-force effects on the bed topography and bed-surface sediment size gradation in a channel bend. With the lifting-force effects considered, it is shown that the errors in simulated bed topography can be reduced by approximately 40% and in bed-surface sediment size by 50%.
publisherAmerican Society of Civil Engineers
titleEffects of Lifting Force on Bed Topography and Bed-Surface Sediment Size in Channel Bend
typeJournal Paper
journal volume137
journal issue9
journal titleJournal of Hydraulic Engineering
identifier doi10.1061/(ASCE)HY.1943-7900.0000402
treeJournal of Hydraulic Engineering:;2011:;Volume ( 137 ):;issue: 009
contenttypeFulltext


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