Validation and application of breakage model in the discrete element method through the simulation of comminution systems

Detalhes bibliográficos
Autor(a) principal: André, Flávio Pereira
Data de Publicação: 2019
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Institucional da UFRJ
Texto Completo: http://hdl.handle.net/11422/13516
Resumo: The present work describes a detailed empirical-phenomenological model that characterizes all relevant aspects of body breakage and has been implemented in the commercial DEM platform Rocky DEM, adopting a particle replacement scheme to represent particle fragmentation. The model describes fundamental properties of ore particles, such as the distribution of fracture energy among a population of particles, the size effect on breakage probability, the weakening of particles due to repeated stressing events and the relation between energy and fragment size distribution. At a first stage, the verification of the model has been carried out by comparing results from the analytical model previously fitted to experimental data with simulations of single particle breakage tests. Sensitivity analysis of simulations varying different relevant parameters has also been performed. Afterwards, the simulation model was validated by comparing its results to drop ball test experiments on unconfined particle beds. The good agreement demonstrates the potential of the model to simulate more complex systems in which DEM simulations must include an effective description of breakage. Finally, the model has been used to simulate a laboratory-scale cone crusher and a pilot-scale horizontal shaft impact crusher.
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spelling Validation and application of breakage model in the discrete element method through the simulation of comminution systemsValidação e aplicação de modelo de quebra no método dos elementos discretos através da simulação de sistemas de cominuiçãoCominuiçãoMétodo dos elementos discretosRocky DEMCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAThe present work describes a detailed empirical-phenomenological model that characterizes all relevant aspects of body breakage and has been implemented in the commercial DEM platform Rocky DEM, adopting a particle replacement scheme to represent particle fragmentation. The model describes fundamental properties of ore particles, such as the distribution of fracture energy among a population of particles, the size effect on breakage probability, the weakening of particles due to repeated stressing events and the relation between energy and fragment size distribution. At a first stage, the verification of the model has been carried out by comparing results from the analytical model previously fitted to experimental data with simulations of single particle breakage tests. Sensitivity analysis of simulations varying different relevant parameters has also been performed. Afterwards, the simulation model was validated by comparing its results to drop ball test experiments on unconfined particle beds. The good agreement demonstrates the potential of the model to simulate more complex systems in which DEM simulations must include an effective description of breakage. Finally, the model has been used to simulate a laboratory-scale cone crusher and a pilot-scale horizontal shaft impact crusher.O presente trabalho descreve um modelo empírico-fenomenológico que cobre todos os aspectos relevantes da quebra de partículas e foi implementado na plataforma comercial Rocky DEM, adotando um esquema de substituição de partículas para representar a fragmentação de partículas. O modelo descreve propriedades fundamentais de partículas minerais, como a distribuição de energia de fratura em uma população de partículas, o efeito de tamanho na probabilidade de quebra, o enfraquecimento de partículas devido a impactos repetidos e a relação entre energia e a distribuição de tamanho de fragmentos. Numa primeira fase, a verificação do modelo foi realizada comparando os resultados do modelo analítico previamente ajustado aos dados experimentais com as simulações de testes de quebra de partículas individuais. A análise de sensibilidade das simulações variando diferentes parâmetros relevantes também foi realizada. Posteriormente, o modelo de simulação foi validado através da comparação de seus resultados com experimentos de teste de impacto em leitos de partículas não confinados. A boa concordância demonstra o potencial do modelo para simular sistemas mais complexos nos quais as simulações do DEM devem incluir uma descrição efetiva da quebra. Por fim, o modelo foi utilizado para a simulação de um britador cônico em escala de laboratório e um britador de impacto de eixo horizontal em escala piloto.Universidade Federal do Rio de JaneiroBrasilInstituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de EngenhariaPrograma de Pós-Graduação em Engenharia Metalúrgica e de MateriaisUFRJTavares, Luís Marcelo Marqueshttp://lattes.cnpq.br/6206135067669212http://lattes.cnpq.br/5932587843323312Carvalho, Rodrigo Magalhães deAlves, José Luis DrummondPotapov, AlexanderAndré, Flávio Pereira2021-01-15T19:32:44Z2023-12-21T03:07:20Z2019-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/11422/13516enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRJinstname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJ2023-12-21T03:07:20Zoai:pantheon.ufrj.br:11422/13516Repositório InstitucionalPUBhttp://www.pantheon.ufrj.br/oai/requestpantheon@sibi.ufrj.bropendoar:2023-12-21T03:07:20Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.none.fl_str_mv Validation and application of breakage model in the discrete element method through the simulation of comminution systems
Validação e aplicação de modelo de quebra no método dos elementos discretos através da simulação de sistemas de cominuição
title Validation and application of breakage model in the discrete element method through the simulation of comminution systems
spellingShingle Validation and application of breakage model in the discrete element method through the simulation of comminution systems
André, Flávio Pereira
Cominuição
Método dos elementos discretos
Rocky DEM
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
title_short Validation and application of breakage model in the discrete element method through the simulation of comminution systems
title_full Validation and application of breakage model in the discrete element method through the simulation of comminution systems
title_fullStr Validation and application of breakage model in the discrete element method through the simulation of comminution systems
title_full_unstemmed Validation and application of breakage model in the discrete element method through the simulation of comminution systems
title_sort Validation and application of breakage model in the discrete element method through the simulation of comminution systems
author André, Flávio Pereira
author_facet André, Flávio Pereira
author_role author
dc.contributor.none.fl_str_mv Tavares, Luís Marcelo Marques
http://lattes.cnpq.br/6206135067669212
http://lattes.cnpq.br/5932587843323312
Carvalho, Rodrigo Magalhães de
Alves, José Luis Drummond
Potapov, Alexander
dc.contributor.author.fl_str_mv André, Flávio Pereira
dc.subject.por.fl_str_mv Cominuição
Método dos elementos discretos
Rocky DEM
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
topic Cominuição
Método dos elementos discretos
Rocky DEM
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
description The present work describes a detailed empirical-phenomenological model that characterizes all relevant aspects of body breakage and has been implemented in the commercial DEM platform Rocky DEM, adopting a particle replacement scheme to represent particle fragmentation. The model describes fundamental properties of ore particles, such as the distribution of fracture energy among a population of particles, the size effect on breakage probability, the weakening of particles due to repeated stressing events and the relation between energy and fragment size distribution. At a first stage, the verification of the model has been carried out by comparing results from the analytical model previously fitted to experimental data with simulations of single particle breakage tests. Sensitivity analysis of simulations varying different relevant parameters has also been performed. Afterwards, the simulation model was validated by comparing its results to drop ball test experiments on unconfined particle beds. The good agreement demonstrates the potential of the model to simulate more complex systems in which DEM simulations must include an effective description of breakage. Finally, the model has been used to simulate a laboratory-scale cone crusher and a pilot-scale horizontal shaft impact crusher.
publishDate 2019
dc.date.none.fl_str_mv 2019-08
2021-01-15T19:32:44Z
2023-12-21T03:07:20Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/11422/13516
url http://hdl.handle.net/11422/13516
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Metalúrgica e de Materiais
UFRJ
publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Metalúrgica e de Materiais
UFRJ
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRJ
instname:Universidade Federal do Rio de Janeiro (UFRJ)
instacron:UFRJ
instname_str Universidade Federal do Rio de Janeiro (UFRJ)
instacron_str UFRJ
institution UFRJ
reponame_str Repositório Institucional da UFRJ
collection Repositório Institucional da UFRJ
repository.name.fl_str_mv Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ)
repository.mail.fl_str_mv pantheon@sibi.ufrj.br
_version_ 1815456012135563264

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