The present study consists of a new mathematical-experimental investigation on local scour downstream of a rigid bed. New scouring experiments, under both steady and unsteady flow conditions, were carried out and the scour patterns were measured with a 3D Laser Scanner. The initial bed shear stress induced by the turbulent flow over the sand bed was estimated by analysing velocity profiles. A mathematical model simulating the local scour downstream of a rigid bed and using both information relating to the turbulent flow and the physical and mechanical properties of the sand was developed. The mathematical structure of the model includes a second order partial differential parabolic equation with the shape of the mobile bed as unknown parameter. The sediment transport was computed by the Einstein approach. The space-time evolution of the simulated scour holes are in good agreement with the measured ones for both steady and unsteady flow tests. © 2014 Taylor & Francis Group, London.

Dodaro, G., Tafarojnoruz, A., Calomino, F., Gaudio, R., Stefanucci, F., Adduce, C., et al. (2014). An experimental and numerical study on the spatial and temporal evolution of a scour hole downstream of a rigid bed. In Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014 (pp.1415-1422). CRC Press/Balkema.

An experimental and numerical study on the spatial and temporal evolution of a scour hole downstream of a rigid bed

Abstract

The present study consists of a new mathematical-experimental investigation on local scour downstream of a rigid bed. New scouring experiments, under both steady and unsteady flow conditions, were carried out and the scour patterns were measured with a 3D Laser Scanner. The initial bed shear stress induced by the turbulent flow over the sand bed was estimated by analysing velocity profiles. A mathematical model simulating the local scour downstream of a rigid bed and using both information relating to the turbulent flow and the physical and mechanical properties of the sand was developed. The mathematical structure of the model includes a second order partial differential parabolic equation with the shape of the mobile bed as unknown parameter. The sediment transport was computed by the Einstein approach. The space-time evolution of the simulated scour holes are in good agreement with the measured ones for both steady and unsteady flow tests. © 2014 Taylor & Francis Group, London.
Scheda breve Scheda completa Scheda completa (DC)
2014
9781138026742
9781138026742
Dodaro, G., Tafarojnoruz, A., Calomino, F., Gaudio, R., Stefanucci, F., Adduce, C., et al. (2014). An experimental and numerical study on the spatial and temporal evolution of a scour hole downstream of a rigid bed. In Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014 (pp.1415-1422). CRC Press/Balkema.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: `https://hdl.handle.net/11590/308103`
• ND
• 20
• ND