Numerical Simulation Of Dam-break Wave Over Irregular Topography

The hydraulic structure could be damaged due to natural or human factors. Once it happens, it would destroy lots of the properties and lives downstream of the structure. Therefore, safety of the hydraulic structure is the most important factor of the design and management. Simulation of the dam-break wave plays a key role hi assessing the effect of hydraulic structure damaging and provides the basis for exploring system assessing environmental and ecological consequences. Two schemes, TVD-MacCormack and TVD-MUSCL were constructed based on Finite Volume Method (FVM) with high performance. Two schemes can be used to compute discharge, water level at collapsed dam-toe and each section along the propagating route, the sharp front of the wave. Two models were tested by analytical solution of one-dimensional dam-break wave. The results showed that the models could capture the dam-break wave front correctly and eliminate the false numerical oscillations. The models overcome either too much dissipation or numerical oscillation, which many other schemes do. This thesis also developed a technique treating complicated geometry. The results from the simulation of the dam-break wave propagating on a real topography prove that the technique developed in this thesis is useful in practice.