Numerical Simulation of Vortex Shedding Frequency and the Oscillation Lift Based on Gas-liquid Two-phase Flow Around Circular Cylinders in the Vertical Pipeline

摘要

Gas-liquid two-phase flow around circular cylinders based on RNG k-ε turbulence model is simulated with the finite volume method and the turbulence relationship caused by the shear and the bubble. The results show that the vortex shedding frequency increases with the increase of the void fraction and the oscillation lift coefficient increases with the slow growth of the void fraction, when the void fraction increases is up to 0.1 the oscillation lift coefficient increases faster as far as gas-liquid two-phase flow around circular cylinders is concerned. Compared with experimental results, it is confirmed that experimental results coincide with the simulation results, and verify the validity of the simulation results.