IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 1 - KEYNOTE AND INVITED LECTURES : Numerical Comparison of Three- and Two-dimensional Model for Modeling Meandering Channel Flow
Numerical Comparison of Three- and Two-dimensional Model for Modeling Meandering Channel Flow
Author : Suiliang Huang, Yafei Jia, Guanghai Gao, Qiuwen Chen and Sam S. Y. Wang
Flow passing through channel bends is three-dimensional. Some three-dimensional models have been developed to simulate this flow phenomenon. However, for practical engineering problems three-dimensional models generally are not computationally efficient, two-dimensional models are thus generally adopted. Previous studies showed that the inclusion of dispersion terms results in improved predictions of vertically-averaged velocity in bend-flow simulations. However, these previous studies did not clarify that to what extent and why the simulated results from the conventional two-dimensional model deviate from the reality in curved channels or to what extent and why the dispersion terms could not be ignored in curved channel flow modeling. In this study, numerical comparisons of vertically-averaged flow results in a U-shaped experimental flume by using two-dimensional model CCHE2D and three-dimensional model CCHE3D, were conducted. Dispersion terms and their intermediate terms were computed using simulated results from the three-dimensional model, which can partly explain the difference of vertically-averaged velocities obtained between two- and three-dimensional models.
File Size : 905,366 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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