Numerical Study on an Interface Compression Method for the Volume of Fluid Approach

Many thermohydraulic issues about the safety of light water reactors are related to complicated two-phase flow phenomena. In these phenomena, computational fluid dynamics (CFD) analysis using volume (VOF) method causes numerical diffusion generated by first-order upwind scheme used in convection term fraction equation. Thus, this study, we focused on an interface compression (IC) for such a VOF approach; technique prevents and maintains boundedness conservation with negative diffusion. First, sufficiently high mesh resolution without IC method, validation process was considered comparing amplitude growth interfacial wave between two-dimensional gas sheet quiescent liquid linear theory. The disturbance rates were consistent theory, appropriate. Then, confirmed effects diffusion, derived optimum value coefficient, which is parameter that controls