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A sudden dam failure is usually simulated by the rapid removal of a gate in laboratory tests and numerical simulations. The gate-opening time is often determined according to the Lauber and Hager instantaneous collapse criterion (referred to as the Lauber&ndash, Hager criterion), which is established for a rectangular open channel with a dry bed. However, this criterion is not suitable for non-rectangular channels or initial wet-bed conditions. In this study, the effect of the gate-opening time on the wave evolution is investigated by using the large eddy simulation (LES) model. The instantaneous dam-break, namely, a dam-break without a gate, is simulated for comparison. A gate-opening criterion for generating dam-break flow in a non-rectangular wet-bed channel is proposed in this study, which can be used as an extension of the Lauber&ndash, Hager criterion and provides a more comprehensive and reasonable estimate of the gate opening time.

Submitted by CLICIA GIOVANE ALVES PEREIRA (cliciageovana@gmail.com) on 2019-04-30T12:36:24Z No. of bitstreams: 1 DissertacaoCliciaPereira.pdf: 12055835 bytes, checksum: 835f7a8c8364749812ef6a0b97e34341 (MD5) Rejected by Claudia Adriana Spindola null (claudia@fct.unesp.br), reason: Bom dia. Solicitamos que realize correções na submissão seguindo as orientações abaixo: - Acrescentar a seguinte expressão do financiador nos agradecimentos : O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Código de Financiamento 001 Agradecemos a compreensão. on 2019-04-30T13:05:34Z (GMT) Submitted by CLICIA GIOVANE ALVES PEREIRA (cliciageovana@gmail.com) on 2019-04-30T13:16:32Z No. of bitstreams: 1 DissertacaoCliciaPereira.pdf: 12055872 bytes, checksum: b323dad760eb33bbceeb6f0a289a9cba (MD5) Approved for entry into archive by Claudia Adriana Spindola null (claudia@fct.unesp.br) on 2019-04-30T13:22:53Z (GMT) No. of bitstreams: 1 pereira_cga_me_prud.pdf: 9381855 bytes, checksum: cc1778dd90e465912281bc87db536675 (MD5) Made available in DSpace on 2019-04-30T13:22:53Z (GMT). No. of bitstreams: 1 pereira_cga_me_prud.pdf: 9381855 bytes, checksum: cc1778dd90e465912281bc87db536675 (MD5) Previous issue date: 2019-03-29 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Neste trabalho, apresenta-se o método Lagrangiano de partículas livre de malhas, Smoothed Particle Hydrodynamics (SPH). Neste método, o domínio do problema é discretizado empregando partículas que possuem propriedades físicas calculadas a partir das propriedades das partículas vizinhas, por meio de uma interpolação, utilizando uma função de suavização. O método foi aplicado para discretizar e adaptar para SPH um modelo de ruptura de barragem sobre um leito úmido conhecido como Dam-Break in Wet-Bed. Tal modelo, considerado ideal, é empregado nos testes de desempenho, precisão e confiabilidade de modelos matemáticos para validação de métodos numéricos aplicados a problemas de vertedouros em barragens hidrelétricas e ondas em praias. In this work, we present the Lagrangian mesh-free method of particles, Smoothed Particle Hydrodynamics (SPH). In this method, the problem domain is discretized using particles having physical properties calculated from neighboring particles by means of interpolation using a smoothing function. The method was applied to discretize and to adapt the SPH for a model of dam rupture on a wet-bed known as Wet-Dam-Break. This model, considered as ideal, is used in tests of performance, accuracy and reliability of mathematical models for validation of numerical methods applied to spillways problems in hydroelectric dams and waves at beaches.