Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
POLYGON WALL BOUNDARY MODEL IN PARTICLE-BASED METHOD: APPLICATION TO BRUMADINHO TAILINGS DAM FAILURE
Submission Author:
Rubens Augusto Amaro Junior , SP
Co-Authors:
Rubens Augusto Amaro Junior, Lucas Soares Pereira, Liang-Yee Cheng, Ahmad Shakibaeinia
Presenter: Rubens Augusto Amaro Junior
doi://10.26678/ABCM.COBEM2019.COB2019-1869
Abstract
Recent tailings dam disasters in Brazil have increased the public concern on the risk and potential environmental damages of the existing tailings dams. The prediction of tailings slurry flow due to the dam failures is of great importance for incident prevention and mitigation. This study aims to develop a numerical model in order to predict potential damage thus assisting in a management plan to save human lives against such tailings dam failures. The numerical model is based on the mesh-free particle-based method weakly compressible moving particle semi-implicit and the explicitly represented polygon wall boundary model, in which the fluid domain is modeled by Lagrangian particles whereas solid boundaries are represented by triangular polygons. Besides the reduced computational cost, polygons are more flexible to model the surface of the complicated-shaped bodies compared with conventional particle-based representation. First, the numerical model is validated by experimental data from a 3D dam breaking problem. After that, the numerical model is applied to the Córrego do Feijão mine tailings dam failure accident. The comparison of the computed results with the known consequences shows the ability of the model to reproduce the three-dimensional dynamic behavior of the destructive tailings slurry flow that may occur on complicated terrain.
Keywords
tailings dam failure, disaster prevention and mitigation, Numerical simulation, polygon wall boundary model, moving particle semi-implicit
