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A Finite Volume Approach for Transient Flow in Urban Stormwater Drainage System Containing Trapped Air

Author(s): Ling Zhou, Alain Joel Elong, Xu Yang, Huan Wang, Tianwen Pan

Linked Author(s): Ling Zhou

Keywords: Urban stormwater drainage systems, transient flow, trapped air, computation.

Abstract: Flow transients of air-water interactions in urban stormwater drainage systems under rapid flow surcharging conditions were investigated. First-order Finite Volume Method (FVM) Godunov-type scheme was developed to handle air-water problem in a rapid filling closed-end pipeline with tail water. The exact Reimann solution was introduced to provide the fluxes at grid interface in water region. The air-water interface was tracked by Godunov-type schemes coupled with ideal air law. The pressure results predicted by the proposed FVM model were compared with the experimental data and the results from the previous elastic model with fixed-grid Method of Characteristics (MOC) scheme. Comparisons show that the proposed model is successful in simulating transient pressure. Moreover, the first-order FV model and the MOC model could obtain the consistent simulation results, since the two models have the same first-order accuracy

DOI:

Year: 2017

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