DNS of Single and Multi-Phase Flows

DNS approach recently became an affordable tool in obtaining multiphase turbulence data for testing and validation of the new spectral turbulence models. Performing the DNS of multiphase flows using a state of the art massively parallel finite element based code (PHASTA) provides a unique opportunity to contribute to the development of new closure laws necessary for successful application of computational multiphase fluid dynamics in nuclear reactor thermal-hydraulics analysis.

Multiscale Nuclear Reactor Simulations

The required technological and safety standards for future Gen-IV Reactors can only be achieved if advanced simulation capabilities become available, which combine high performance computing with the necessary level of modeling detail and high accuracy of predictions. Interaction between different numerical codes working on various scales (DNS, RaNS, solid/structure interaction) on different parts of multiphase three-dimensional transient problem (such as nuclear reactor accident scenario) gives the ability to develop new multiscale multi-field models and simulations in various areas of nuclear engineering.

Spectral Cascade Transfer Multiphase Flows

The modeling of multiphase flows has wide range of applications in the fields of nuclear, chemical, biomedical engineering. Recent advances in the development of single and two-phase spectral turbulent models show promising results in extending those models to more complex type of two-phase bubbly flows (such as non-homogeneous conduit flows, boundary layer flows, free shear flows) and multi-component flows. The new generation of the advanced turbulence two-phase flow models will provide unprecedented abilities in designing new generation of safe and powerful nuclear power plants.