Numerical analysis of free-surface flows over rubber dams

Chia Ren Chu, Truc Thi Thu Tran, Tso Ren Wu

研究成果: 雜誌貢獻期刊論文同行評審

摘要

This study integrates a large eddy simulation (LES) model and volume of fluid (VOF) method to simulate the free-surface flows over inflexible circular-crested dams of different shapes. The simulated water depths and pressures on the dam surface are validated by the results of laboratory experiments. Then the numerical model examines the effects of the water depths and the Reynolds number on the hydrodynamic force and the discharge coefficient. The simulation results reveal that the time-averaged drag coefficient decreases as the downstream water depth H2 increases, while the influence of water depth H2 on the lift coefficients is less significant. Furthermore, the discharge coefficients of circular and elliptical dams, computed from the simulated velocity profiles over the crest of the dam, agree with the formulae suggested by previous studies when the downstream depth H2/H1 < 0.90. In contrast, the discharge coefficient of a tear-shape dam is slightly larger than those of circular dams.

原文???core.languages.en_GB???
文章編號1271
期刊Water (Switzerland)
13
發行號9
DOIs
出版狀態已出版 - 5月 2021

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