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http://dx.doi.org/10.12652/Ksce.2014.34.2.0479

A Study on Imposing Exact Solutions as Internal Boundary Conditions in Simulating Shallow-water Flows over a Step  

Hwang, Seung-Yong (Korean Institute of Construction Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.34, no.2, 2014 , pp. 479-492 More about this Journal
Abstract
In this study, was proposed a numerical scheme imposing exact solutions as the internal boundary conditions for the shallow-water flows over a discontinuous transverse structure such as a step. The HLLL approximate Riemann solver with the MUSCL was used for the test of the proposed scheme. Very good agreement was obtained between simulations and exact solutions for various problems of the shallow-water flows over a step. In addition, results by the numerical model showed good agreement with those of dam-break experiments over a step and stepped chute one. Developed model can simulate the shallow-water flows over discontinuous bottom such as a drop structure without additional rating curve or topography smoothing. Given the proper evaluations for the flow resistance by a step and the energy loss by the nappe flow in the future, could be simulated flooding and drying of the shallow-water flows over discontinuous topography such as a weir or the river road with retaining wall.
Keywords
Shallow-water flow; Internal boundary; Riemann solver; Exact solution; Discontinuous topography; Step;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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