Flood caused by a dam-breaking flow may be catastrophic for the downstream area due to the sudden discharge of large volumes of water. Besides the complex flow of the propagating dam-break wave, the presence of structures such as bridges and buildings yield free surfaces which can be accurately reproduced by means of three-dimensional CFD software. The prediction of the dam-break flow main features in the presence of obstacles has a crucial role to decrease the damage. In this study, small scale laboratory experiments were conducted to examine the problem with a single obstacle. Five ultrasonic sensors were used as measurement devices. Measurements were compared with the numerical results obtained with the FLOW-3D software, solving RANS Equations with the k-eps turbulence closure model. A good agreement was observed generally in the water level – time graphs.
Experimental and numerical analysis of 3d dam-break waves in an enclosed domain with a single oriented obstacle
Stefania Evangelista;
2020-01-01
Abstract
Flood caused by a dam-breaking flow may be catastrophic for the downstream area due to the sudden discharge of large volumes of water. Besides the complex flow of the propagating dam-break wave, the presence of structures such as bridges and buildings yield free surfaces which can be accurately reproduced by means of three-dimensional CFD software. The prediction of the dam-break flow main features in the presence of obstacles has a crucial role to decrease the damage. In this study, small scale laboratory experiments were conducted to examine the problem with a single obstacle. Five ultrasonic sensors were used as measurement devices. Measurements were compared with the numerical results obtained with the FLOW-3D software, solving RANS Equations with the k-eps turbulence closure model. A good agreement was observed generally in the water level – time graphs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
