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http://dx.doi.org/10.3741/JKWRA.2011.44.7.511

Numerical Simulation of Urban Flash Flood Experiments Using Adaptive Mesh Refinement and Cut Cell Method  

An, Hyun-Uk (Numerical Program Team, Division of Computational Sciences in Mathematics National Institute for Mathematical Sciences)
Yu, Soon-Young (Numerical Program Team, Division of Computational Sciences in Mathematics National Institute for Mathematical Sciences, KT Daeduk 2 Research Center)
Publication Information
Journal of Korea Water Resources Association / v.44, no.7, 2011 , pp. 511-522 More about this Journal
Abstract
Two-dimensional shallow water model based on the cut cell and the adaptive mesh refinement techniques is presented in this paper. These two mesh generation methods are combined to facilitate modeling of complex geometries. By using dynamically adaptive mesh, the model can achieve high resolution efficiently at the interface where flow changes rapidly. The HLLC Reimann solver and the MUSCL method are employed to calculate advection fluxes with numerical stability and precision. The model was applied to simulate the extreme urban flooding experiments performed by the IMPACT (Investigation of Extreme Flood Processes and Uncertainty) project. Simulation results were in good agreement with observed data, and transient flows as well as the impact of building structures on flood waves were calculated with accuracy. The cut cell method eased the model sensitivity to refinement. It can be concluded that the model is applicable to the urban flood simulation in case the effects of sewer and stormwater drainage system on flooding are relatively small like the dam brake.
Keywords
Shallow water equation; Adaptive mesh refinement; Cut cell method; Urban flash flood;
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Times Cited By KSCI : 4  (Citation Analysis)
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