Overview of Activities in Computational Fluid Dynamics Group
by
Bojan Niceno(Paul Scherrer Institut)
→
Europe/Zurich
OFLG/401 (Paul Scherrer Institut)
OFLG/401
Paul Scherrer Institut
Description
Abstract: The Computational Fluid Dynamics (CFD) group deals with computational modeling of single and multi-phase fluid flow for a myriad of applications in nuclear safety. The modeling approaches used in the group range in scales from nano-scales (molecular level) to system-scale (entire plants), and are applied to all generations of nuclear reactors. The group devotes significant efforts in improvement of existing physical models and development of new ones, with the aim of expanding the applicability of computational tools used in nuclear safety. The most notable examples of such efforts are subgrid-scale models for boiling simulations and improved interface phenomena modeling by the phase-field approach. In addition to these basic developments which are performed under the framework of funding by Swissnuclear and European Commission (EC) projects, the group also conducts applied research for utilities, Swiss regulatory body ENSI, international academic and industrial partners. Several recent analyses and developments will be highlighted in this talk. The talk will start at the containment scale, i.e. hydrogen distribution analysis in a real containment of a Swiss utility using the GOTHIC code. At the CFD scale, the latest results on the simulation of PROBAB tests will be shown as well as large-eddy simulation predictions of mixing of gases at high density ratios. The talk will be wrapped with the new model developments at the micro scale, as well as the update to the phase-field approach we use for modeling of interface phenomena.
