MODIFICATION AND VERIFICATION OF NUMERICAL ALGORITHMS FOR DAM-BREAK FLOW OVER A HORIZONTAL BED

Abstract: Numerical simulation of dam-break water flow over a horizontal dry bed has been performed. We have modified and verified computational techniques, including methods for determining the position of the interface and the continuum model for the surface tension force implemented in the PIFI code, as well as the OpenFOAM software with the interFoam solver and various cases of the two-parameter k-ϵ model with corrections made taking into account the behavior of flows in regions of low Reynolds numbers. Calculated integral characteristics of dam-break flow were analyzed and compared with measured data. It is shown that taking into account surface tension and using an adequate turbulence model leads to deceleration of water flow and hence to a decrease in the velocity of the wave front, resulting in better agreement between the results of calculations and laboratory experiments.