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oai:recercat.cat:2117/4072142026-01-14T08:14:03Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Rangel, Rafael L. author Cornejo Velázquez, Alejandro author Oñate Ibáñez de Navarra, Eugenio author Franci, Alessandro author 2024-04 This work presents an efficient Discrete Element Method (DEM) framework for the simulation of the thermal behavior of granular media. The main focus is on long-lasting granular flows, involving heat transfer and generation due to mechanical energy dissipation. The proposed approach uses efficient strategies to reduce the computational cost of the analyses and, therefore, to enable its application to problems of practical relevance. For instance, the contact area is adjusted to compensate for the artificial material softening that is typically considered in DEM to increase the time step size. After extended validation, the methodology is applied to the simulation of different setups of an experimental rotating drum. The numerical simulations presented good agreement with the experimental results and allowed a detailed analysis of the mechanisms and patterns of heat generation, which could not be extrapolated from the experimental campaign. The authors acknowledge the support from MCIN/AEI, Spain and FEDER Una manera de hacer Europa for funding this work via project PID2021-122676NB-I00. The authors also acknowledge the Severo Ochoa Programme, Spain through the Grant CEX2018-000797-S funded by the Spanish Ministry of Economy and Competitiveness, Spain through the “Severo Ochoa Programme for Centres of Excellence in R&D”. The first author acknowledges the Marie SKŁODOWSKA-CURIE Innovative Training Network MATHEGRAM, the People Programme (Marie SKŁODOWSKA-CURIE Actions) of the European Union’s Horizon 2020 Programme H2020 under REA grant agreement No. 813202, for funding part of his research. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits Granular flow -- Mathematical models Discrete element method Heat generation Heat transfer Granular flow Rotating drum Materials granulars -- Dinàmica de fluids Efficient discrete element modeling of heat generation and transfer in granular flows: validation and application