Progress in the Development of Compressible, Multiphase Flow Modeling Capability for Nuclear Reactor Flow Applications

Berry, R. A. ; Saurel, R. ; Petitpas, F. ; Daniel, E. ; Metayer, O. Le ; Gavrilyuk, S. ; Dovetta, N.

Idaho National Laboratory

关键词: Heat Transfer;    Bubble Growth;    Two-Phase Flow Flow Modeling Capability;    Safety;    Simulation;   

DOI  :  10.2172/946849
RP-ID  :  INL/EXT-08-15002
RP-ID  :  DE-AC07-99ID-13727
RP-ID  :  946849

美国|英语

来源: UNT Digital Library

【 摘 要 】

In nuclear reactor safety and optimization there are key issues that rely on in-depth understanding of basic two-phase flow phenomena with heat and mass transfer. Within the context of multiphase flows, two bubble-dynamic phenomena – boiling (heterogeneous) and flashing or cavitation (homogeneous boiling), with bubble collapse, are technologically very important to nuclear reactor systems. The main difference between boiling and flashing is that bubble growth (and collapse) in boiling is inhibited by limitations on the heat transfer at the interface, whereas bubble growth (and collapse) in flashing is limited primarily by inertial effects in the surrounding liquid. The flashing process tends to be far more explosive (and implosive), and is more violent and damaging (at least in the near term) than the bubble dynamics of boiling. However, other problematic phenomena, such as crud deposition, appear to be intimately connecting with the boiling process. In reality, these two processes share many details.