3D SIMULATION OF LARGE-SCALE HYDRODYNAMIC EVENTS IN THE OPENFOAM PACKAGE
Keywords:
Computational fluid dynamics, OpenFOAM, volume of fluid method, Navier-Stokes equations, dam failure modeling, free surface, turbulenceAbstract
This article discusses a methodology for three-dimensional, unsteady-state modeling of large-scale free-surface fluid flows under complex terrain conditions using the open-source OpenFOAM computational fluid dynamics package. The mathematical foundation of the model is based on the Reynolds-averaged Navier-Stokes (RANS) equations, the standard k-varepsilon turbulence model, and the volume of fluid (VOF) method for tracking the dynamics of the air-water interface. The computational model is validated using classical test problems of liquid column collapse (including in the presence of an obstacle), and the practical potential of the technology is illustrated using examples of numerically predicting flood zones during a hypothetical dam failure of the Papan and Kamperabad reservoirs in Kyrgyzstan.
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