Numerical Study of Two-phase Flow Based on OpenFOAM for Dynamic Characteristics of Deflecting Flow of a Certain Spillway
In the process of ski-jump energy dissipation,the water tongue exhibits obvious gas-liquid two-phase flow characteristics in the air section and during the process of falling into the downstream water cushion pool.In order to fur-ther explore the hydrodynamic characteristics of this process,it is necessary to construct a more advanced gas-liquid two-phase flow numerical model.Therefore,this paper uses the CFD open source software OpenFOAM to construct a three-dimensional numerical model of two-phase flow.The numerical model is verified by the water tongue results measured in the deflecting flow experiments.Numerical simulation results are consistent with the test.This paper also compares the numerical simulation results obtained by the κ-ω SST turbulence model with the existing empirical equations for the de-flecting flow range,and the results show that the κ-ω SST turbulence model is closer to the experimental results.Finally,based on the numerical simulation results,the dynamic water pressure distribution characteristics of the water cushion pond under the action of the jet are analyzed.It is found that the maximum values of turbulent kinetic energy at the bot-tom of the pond are located at 1.26 L1,1.23 L2,1.093 L3 and 1.001 L4 from the flip bucket.The maximum pond bot-tom pressure is located at approximately 0.91L3 from the flip bucket,which is also the lowest flow velocity lag point in the whole calculation domain.This study can provide references for the related studies on the deflecting flow process.
trajectory jetgas-liquid two-phase flowOpenFOAMmodel testturbulent flow model
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