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Inundation Simulation of Underground Space using Critical Dry Depth Scheme
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 Title & Authors
Inundation Simulation of Underground Space using Critical Dry Depth Scheme
Rhee, Dong Sop; Kim, Hyung-Jun; Song, Chang Geun;
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In this study, a 2D hydrodynamic model equipped with critical dry depth scheme was developed to reproduce the flow over staircase. The channel geometry of hydraulic experiment conducted by Ishigaki et al. was generated in the computational space, and the developed model was validated against flow properties such as discharge, velocity and momentum. In addition, the water surface profile and the velocity distribution evolved in flow over two layers staircases were analyzed. When the initial water depth at the upper floor was 0.3 m, the maximum velocity at lower floor was 4.2 m/s, and the maximum momentum was , and its conversion to force per unit width was 1.2 kN/m. This value was equivalent to the hydrostatic force with 50 cm water depth, and evacuation became difficult, as proposed by Ishigaki et al. For the flow over staircases connecting two layers, the maximum run-up height in flat part connecting two layers was approximately two times higher than the initial water depth in upper floor, and the rapid shock wave with sharp front and long tail was propagated.
flow over staircase;2D hydrodynamic model;critical dry depth;evacuation;
 Cited by
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C. H. Lee and K. Y. Han, "Integration Model for Urban Flood Inundation Linked with Underground Space Flood Analysis Model", Journal of Korea Water Resources Association, Vol. 40, No. 4, pp. 313-324, 2007. crossref(new window)

W. H. Cho, K. Y. Han and Y. J. Kim, "An Evaluation of Building Effect in 2-Dimensional Inundation Analysis Using GIS", Journal of the Korean Association of Geographic Information Studies, Vol. 13, No. 2, pp. 119-132, 2010.

W. H. Cho, K. Y. Han, T. J. Hwang and A. L. Son, "2-D Inundation Analysis in Urban Area considering Building and Road", Journal of the Korean Society of Hazard Mitigation, Vol. 11, No. 5, pp. 159-168, 2011. crossref(new window)

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J. S. Joo and T. H. Kim, "An experimental Study on Evacuation Ability During underground Space Inundation", Journal of the Korean Society of Hazard Mitigation, Vol. 15, No. 2, pp. 189-196, 2015.

I. W. Seo, Y. D. Kim and C. G. Song, "Validation of Depth-Averaged Flow Model using Flat-Bottomed Benchmark Problems", The Scientific World Journal, Hindawi Publishing Corporation, Article ID 197539, 2014.

C. G. Song and T. K. Oh, "Transient SU/PG Modeling of Discontinuous Wave Propagation", Progress in Computational Fluid Dynamics, 2015 (In press).

C. G. Song and I. W. Seo, "Numerical Simulation of Convection-dominated Flow Using SU/PG Scheme", Journal of the Korean Society of Civil Engineers, Vol. 32, No. 3, pp. 175-183, 2012.