Two-dimensional flexible-mesh modeling for dam break and tailings dams with multiple rheological formulations
Conference
Garcia, R, Juez, C, Murillo, J et al. (2015). Two-dimensional flexible-mesh modeling for dam break and tailings dams with multiple rheological formulations
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Garcia, R, Juez, C, Murillo, J et al. (2015). Two-dimensional flexible-mesh modeling for dam break and tailings dams with multiple rheological formulations
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This paper describes the RiverFlow2D two-dimensional model and its application to dam-break and tailings dams. RiverFlow2D simulates single-phase mud and debris flows in two-dimensional flexible meshes and includes eight different non-Newtonian rheological relationships that allow simulation of hyperconcentrated sediment mixes that often occur in tailings dams flows. The numerical engine is based on a 4th generation finite-volume method that has been verified and validated using analytical solutions, laboratory experiments and data from actual events. Using two-dimensional triangularcell non-structured meshes can model hyperconcentrated flows over complex terrain and urban areas that may include buildings and hydraulic structures. Runs with the high-performance GPU-based model option, presently available for water flow can be more than 140 times faster than the non-parallelized version. In this paper we compare model results with measurements from a dam-break flume experiment, and results show that the model accurately replicates experimental data. We also apply the model to simulate the Rudd Creek mudflow event in the USA where the model compares well to the observed runout, yield-stress fluid stoppage, sediment deposition depths and extents. Finally, the paper summarizes a simulation for a risk assessment study of a tailings dam-break that illustrates the differences between using two rheological formulations to the same event.
