TY - GEN
T1 - Vertical and horizontal two-dimensional numerical modeling of dam-break flow over fixed beds
AU - Marsooli, Reza
AU - Zhang, Mingliang
AU - Wu, Weiming
PY - 2011
Y1 - 2011
N2 - In this study, two distinct two-dimensional (2D) models have been applied to simulate unsteady flow due to dam break. The first model, which is a horizontal 2D model, solves the shallow water equations using a Godunov-type or upwind finite volume method. The intercell fluxes are computed using the second-order HLL approximate Riemann solver. The second model, which is a vertical 2D model, solves the Navier-Stokes equations using a finite difference method, with the fractional volume of fluid (VOF) used to track the free surface. The two models have been tested in cases of dam-break waves over a wet bed, a dry bed and a triangular obstacle. It has been demonstrated that the vertical 2D model can track the water surface variations in more detail than the horizontal 2D model. However, both models can reasonably well predict the average properties of dam-break flows, such as wave propagation speed and average height.
AB - In this study, two distinct two-dimensional (2D) models have been applied to simulate unsteady flow due to dam break. The first model, which is a horizontal 2D model, solves the shallow water equations using a Godunov-type or upwind finite volume method. The intercell fluxes are computed using the second-order HLL approximate Riemann solver. The second model, which is a vertical 2D model, solves the Navier-Stokes equations using a finite difference method, with the fractional volume of fluid (VOF) used to track the free surface. The two models have been tested in cases of dam-break waves over a wet bed, a dry bed and a triangular obstacle. It has been demonstrated that the vertical 2D model can track the water surface variations in more detail than the horizontal 2D model. However, both models can reasonably well predict the average properties of dam-break flows, such as wave propagation speed and average height.
KW - Dam failures
KW - Numerical models
KW - Two-dimensional models
KW - Unsteady flow
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U2 - 10.1061/41173(414)232
DO - 10.1061/41173(414)232
M3 - Conference contribution
AN - SCOPUS:79960420551
SN - 9780784411735
T3 - World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability - Proceedings of the 2011 World Environmental and Water Resources Congress
SP - 2225
EP - 2233
BT - World Environmental and Water Resources Congress 2011
T2 - World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
Y2 - 22 May 2011 through 26 May 2011
ER -