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SPH modeling for DamBreak waves of irrigation tanks.
Rel. Davide Poggi, Edoardo Daly. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Civile, 2019

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Abstract: 
The present thesis focuses on the use of the threedimensional Smoothed Particle Hydrodynamics (SPH) method to model the propagation of a dambreak wave and its interaction with the area downstream of the dam body. In particular, the Explicit Incompressible SPH scheme was used, which is a variation of the SPH algorithm, where pressure fluctuations and computational effort are largely reduced. This algorithm has been used and validated in the field of twodimensional simulations, but it is somewhat unexplored in the threedimensional one. For this purpose, as the first test, the confrontation with a simulation of a dambreak wave carried out with the twodimensional EISPH scheme and one carried out by Shao & Lo is performed, in order to verify the correct functioning of the algorithm. Then a comparison with a simple analytical solution of a DamBreak wave, given by Ritter's solution, was useful to understand the correctness of the wave profile and of the order of magnitude of the wavefront celerity. Completed these two tests, helpful for the calibration of the algorithm, the experiments of Aureli, Maranzoni, Mignosa and Ziveri were simulated, in which a solid parallelepiped is placed downstream of a breach in the dam body and is hit by the dambreak wave caused by the sudden opening of this breach. In particular, the difference in shape between the wave in the physical and in the numerical model was investigated, paying attention to the variation of water depth between them, in time and space, using the transformation function between grey tones and water depth derived by the authors, realizing a punctual comparison with the EISPH simulation at the same time steps. In order to increase the resolution of the numerical model, which means increase the number of particles present in the domain decreasing their radius, without increasing the computational cost too much, the symmetry of the problem was exploited, realizing only half the domain, thus having half of the necessary particles and a contained computational effort, evaluating again the difference in water depth distribution between the two models. 

Relators:  Davide Poggi, Edoardo Daly 
Academic year:  2018/19 
Publication type:  Electronic 
Number of Pages:  96 
Subjects:  
Corso di laurea:  Corso di laurea magistrale in Ingegneria Civile 
Classe di laurea:  New organization > Master science > LM23  CIVIL ENGINEERING 
Ente in cotutela:  Monash University (AUSTRALIA) 
Aziende collaboratrici:  Monash University 
URI:  http://webthesis.biblio.polito.it/id/eprint/11824 
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