A TWO-FLUID MODEL FINITE VOLUME FORMULATION FOR COMPUTING TWO-PHASE FLOWS IN COMPLEX GEOMETRIES

摘要

A finite volume computational method is presented for predicting two-phase flows in complex geometries using the Two-Fluid model. The discretization methodology is strongly conservative, and employs a robust staggered-grid body-fitted coordinate (BFC) formulation with covariant velocity projections as the dependent variables in the momentum equations. The solution procedure is iterative and sequential/ and the pressure-velocity coupling is treated by an extension of the SIMPLE algorithm. Algorithmic variants for computing pressure correction and volume fractions are discussed and quantitatively assessed using gas-liquid turbulent flows in a U-bend and a 90-degree bend.