Effect of lift on bed-surface sediment size distribution in channel bend

Jiun Huei Jang; Hsin Ya Ho; Chin Lien Yen

doi:10.1080/02533839.2006.9671154

Effect of lift on bed-surface sediment size distribution in channel bend

Jiun Huei Jang, Hsin Ya Ho, Chin Lien Yen

Department of Hydraulic and Ocean Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

A 3D-numerical model based on large eddy simulation and a wall model has been applied to simulate the flow field and bed shear stress in a channel bend. As the bed-surface sediment distribution is related to the shear force and lifting force near the bed, a method for calculation of the lifting force experienced by a sediment particle in a channel bend has been introduced. With some assumptions and deductions, the bed-surface sediment size distribution can be described as a function composed of shear force and lifting force in this study. By comparing with the experimental data, the function reveals that, with the effect of lifting force considered, the accuracy in predicting the bed-surface sediment size distribution can be improved by up to 41% in the transverse direction and 46% in the longitudinal direction.

Original language	English
Pages (from-to)	565-579
Number of pages	15
Journal	Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
Volume	29
Issue number	4
DOIs	https://doi.org/10.1080/02533839.2006.9671154
Publication status	Published - 2006 Jan 1

All Science Journal Classification (ASJC) codes

Engineering(all)

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abstract = "A 3D-numerical model based on large eddy simulation and a wall model has been applied to simulate the flow field and bed shear stress in a channel bend. As the bed-surface sediment distribution is related to the shear force and lifting force near the bed, a method for calculation of the lifting force experienced by a sediment particle in a channel bend has been introduced. With some assumptions and deductions, the bed-surface sediment size distribution can be described as a function composed of shear force and lifting force in this study. By comparing with the experimental data, the function reveals that, with the effect of lifting force considered, the accuracy in predicting the bed-surface sediment size distribution can be improved by up to 41% in the transverse direction and 46% in the longitudinal direction.",

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Effect of lift on bed-surface sediment size distribution in channel bend. / Jang, Jiun Huei; Ho, Hsin Ya; Yen, Chin Lien.

In: Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an, Vol. 29, No. 4, 01.01.2006, p. 565-579.

Research output: Contribution to journal › Article › peer-review

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T1 - Effect of lift on bed-surface sediment size distribution in channel bend

AU - Jang, Jiun Huei

AU - Ho, Hsin Ya

AU - Yen, Chin Lien

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AB - A 3D-numerical model based on large eddy simulation and a wall model has been applied to simulate the flow field and bed shear stress in a channel bend. As the bed-surface sediment distribution is related to the shear force and lifting force near the bed, a method for calculation of the lifting force experienced by a sediment particle in a channel bend has been introduced. With some assumptions and deductions, the bed-surface sediment size distribution can be described as a function composed of shear force and lifting force in this study. By comparing with the experimental data, the function reveals that, with the effect of lifting force considered, the accuracy in predicting the bed-surface sediment size distribution can be improved by up to 41% in the transverse direction and 46% in the longitudinal direction.

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Effect of lift on bed-surface sediment size distribution in channel bend

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