The prediction of stratified two-phase flow with a two-equation model of turbulence

Abstract A two-equation model is applied to a stratified two-phase flow system to predict turbulent transport mechanisms in both phases. In the present analysis, the effects of interfacial waves on the flow field are formulated in terms of boundary conditions for the gas-liquid interface. For the gas phase, the wavy interface has such flow separation effects as a rough surface in a single-phase flow. While for the liquid phase, the waves generate turbulant energy which is transported progressively toward a lower wall region. The analytical results are in good agreement with available data regarding pressure drop, holdup and velocity profiles.