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Applicability of CADMAS-SURF Code for the Variation of Water Level and Velocity due to Bores  

Lee, Kwang-Ho (Department of Civil Engineering Nagoya University)
Kim, Chang-Hoon (Department of Civil Engineering Nagoya University)
Hwang, Yong-Tae (Department of Civil and Environmental Engineering Graduate School, Korea Maritime University)
Kim, Do-Sam (Division of Construction and Environmental Engineering, Korea Maritime University)
Publication Information
Journal of Ocean Engineering and Technology / v.22, no.5, 2008 , pp. 52-60 More about this Journal
Abstract
This study investigates the applicability of CADMAS-SURF (Super Roller Flume for Computer Aided Design of a MArtime Structure) code basal on the Navier-Stokes solver to predict bore phenomena. The time variation of ware levels and velocities due to the bore propagation were computed for the different bore strength conditions. In order to verify the numerical results by CADMAS-SURF, laboratory experiments were also performed, using the DPIV and LDV measuring system. The numerical results were compared to the experimental data and the analytical predictions by the NSC method basal on fully nonlinear shallow-water theory by the method of characteristics. It appears that the CADMAS-SURF slightly overestimated the water-surface level measured by the laboratory experiments and its discrepancy becomes prominent as the bore strength increases. The predicted propagation speed for a bore was also slaver than that by the experiment and NSC method. However, the temporal variations in velocities were in relatively good agreement with the experimental data for all cases, except for overshooting and undershooting in the front face of a bore, which may be derived from the numerical instability. Further, CADMAS-SURF successfully simulated the decrease in the water level and velocity caused by the effects of negative waves reflected from the upstream end wall.
Keywords
Bore; CADMAS-SURF; Bore strength; Laboratory experiment; Propagation speed; Water level; Velocity;
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Times Cited By KSCI : 2  (Citation Analysis)
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