3D numerical simulation of dam-break flow over different obstacles in a dry bed

Abstract

In this research, a numerical investigation was carried out on the effect of obstacle presence on the water flow during the dam-break in a dry bed. The validity of the numerical simulations was confirmed after comparing the results with the experimental evidence. Rectangular, trapezoidal and triangle obstacles were simulated numerically to explain the obstacle effect on the water flow. Water surface tracking and turbulent flow were modeled using the Volume of Fluid (VOF) method and the standard k-ω model, respectively. Pressure and velocity variations during the dam-break flow are presented and analyzed. HIGHLIGHTS Simulation of dam-break flow.; Presence of an obstacle in the flow.; Different obstacle geometries.; Numerical verification of water surface.; Pressure distributions during flow after dam-break.;

Keywords

• dam-break
• fluent software
• free surface flow
• standard k-ω model
• vof