On the direct numerical simulation of two-phase flows

This paper presents the direct numerical simulation (DNS) of various incompressible and compressible single and two-phase flows. It is shown that very detailed information on the flow structure can be obtained using a suitable adaptive grid 3D solver. In addition, it is demonstrated how to use these detailed numerical “data” to obtain interfacial closure models for use in two-fluid, computational multiphase fluid dynamic (CMFD) formulations. These advanced generation 3D CMFD models can, in-turn, be used for nuclear reactor design and analysis.