%0 Journal Article
%A Ji, Ruiyun
%A Wenig, Philipp Josef
%A Kelm, Stephan
%A Klein, Markus
%T Epistemic uncertainty in URANS based CFD analysis of buoyancy driven flows—Comparison of URANS and LES
%J Annals of nuclear energy
%V 181
%@ 0306-4549
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2023-00005
%P 109563 -
%D 2023
%X The containment is the last barrier to prevent the release of radioactive materials into the environment in case of a severe reactor accident. Thus, it is important to understand the flow and transport processes of combustible gases and to develop strategies to maintain the integrity of the containment. A holistic OpenFOAM-based CFD software package, containmentFOAM, is developed for containment analysis. During the validation of the code with regard to free convection flows and mixing processes, it became apparent that the simulation results are fairly sensitive to the definition of initial and boundary conditions, which are often not precisely known from the experiment. Therefore, establishing the validity of the models is impossible without a quantification of uncertainties.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000890307700003
%R 10.1016/j.anucene.2022.109563
%U https://juser.fz-juelich.de/record/916653