An outline of an LES subgrid model for liquid/gas phase interface dynamics

In this paper we report on the outline of a large eddy simulation subgrid model for liquid/gas phase interface dynamics. A key feature of the proposed model is to take the subgrid phase interface dynamics fully into account by employing a dual-scale approach. Instead of modeling the LES subgrid phase interface geometry, we fully resolve it on an auxillary grid using the refined level set grid approach. We then propose to model the LES subgrid velocity on the auxillary grid needed to move the fully resolved phase interface, by solving a dedicated PDE for its evolution near the phase interface. Knowing the fully resolved phase interface geometry, all previously unclosed terms in the filtered Navier-Stokes equations can be directly closed using explicit filtering.