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

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

关键词: BOILING;    BUBBLE GROWTH;    BUBBLES;    CAVITATION;    DEPOSITION;    EXPLOSIVES;    FLASHING;    HEAT TRANSFER;    MASS TRANSFER;    MULTIPHASE FLOW;    OPTIMIZATION;    REACTORS;    SAFETY;    SIMULATION;    TWO-PHASE FLOW flow modeling capability;    nuclear reactor flow;   

DOI  :  10.2172/946849
RP-ID  :  INL/EXT-08-15002
PID  :  OSTI ID: 946849
Others  :  TRN: US0901342

学科分类：社会科学、人文和艺术（综合）

美国|英语

来源: SciTech Connect

【 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.