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http://dx.doi.org/10.3741/JKWRA.2011.44.2.145

Treatment of the Bed Slope Source Term for 2-Dimensional Numerical Model Using Quasi-steady Wave Propagation Algorithm  

Kim, Tae-Hyung (School of Archi. & Civil Engineering, Kyungpook National Univ.)
Han, Kun-Yeun (School of Archi & Civil Engineering, Kyungpook National Univ.)
Kim, Byung-Hyun (Dept. of Civil & Environmental Engineering, University of California)
Publication Information
Journal of Korea Water Resources Association / v.44, no.2, 2011 , pp. 145-156 More about this Journal
Abstract
Two dimensional numerical model of high-order accuracy is developed to analyze complex flow including transition flow, discontinuous flow, and wave propagation to dry bed emerging at natural river flow. The bed slope term of two dimensional shallow water equation consisting of integral conservation law is treated efficiently by applying quasi-steady wave propagation scheme. In order to apply Finite Volume Method using Fractional Step Method, MUSCL scheme is applied based on HLL Riemann solver, which is second-order accurate in time and space. The TVD method is applied to prevent numerical oscillations in the second-order accurate scheme. The developed model is verified by comparing observed data of two dimenstional levee breach experiment and dam breach experiment containing structure at lower section of channel. Also effect of the source term is verified by applying to dam breach experiment considering the adverse slope channel.
Keywords
Quasi-steady wave propagation scheme; fractional step method; HLL Riemann solver; source term;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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