Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

Computational Fluid Dynamics (CFD) codes are widely used in industrial applications for single phase flows, e.g., in the automotive or aircraft industries. On the other hand the application of CFD for multiphase systems is not yet mature. Safety analyses related to nuclear light water reactors require reliable simulations for different scenarios including two-phase flow situations. Prominent examples for Pressurized Water Reactor (PWR) analyses are the prevention from Departure from Nucleate Boiling (DNB) which is related to Critical Heat Flux (CHF) or the Pressurized Thermal Shock (PTS) problem which has to be considered in connection with some hypothetical Loss of Coolant Accident (LOCA) scenarios and may also lead to two-phase flow situations in the cold leg and in the downcomer. In case of Boiling Water Reactors (BWR) analyses e.g. the prevention from Dryout is an important issue. The special issue of the on Science and Technology of Nuclear Installations Journal on "Computational Fluid Dynamics (CFD) for Gas-Liquid Flows" discusses the state of the art and the progress regarding CFD simulations on such two-phase flows.