Favre-filtered LES-VOF of two-phase flows with eddy viscosity-based subgrid closure models: An a-posteriori analysis

Developing functional closure models for all the subgrid scale (SGS) physics in large eddy simulation (LES) of turbulent two-phase flows is yet a challenging task due to complicated turbulence-interface interactions. Our recent study (Saeedipour and Schneiderbauer, 2019) has revisited classical viscosity concept proposed new approach include surface tension into viscosity. It revealed an a-priori competence accurate interfacial turbulence using volume fluid (VOF) method. The present aims exploit potentials this a-posteriori manner, which could be important step towards fully-functional LES flows. On basis Favre-filtered governing equations, corrected model adopted close convective, tension, continuity SGS terms establishes LES-VOF approach. are implemented OpenFOAM-based geometric VOF solver. To perform analysis two benchmark problems considered: (i) 2D phase inversion as also used analysis, (ii) 3D freely-decaying, homogeneous isotropic flow presence initially-flat interface. results reveal that compared conventional Smagorinsky model, method reveals better performance predicting local characteristics well energy spectra, particularly at with density contrasts. Also, size distribution droplets shows agreement fully-resolved data. further unveils importance residual term equation development characteristics. original contribution lies proposing full based on concept. This can more coarse-grid industrial dispersed droplet regimes.