324 微小流路内大規模気泡流構造に関する数値予測(J11-2 流体情報学と可視化(2),J11 流体情報学と可視化,2005年度年次大会)

概要

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In order to predict the water-vapor two-phase flow configurations in a fuel bundle of an advanced light water reactor, a large-scale numerical simulation was carried out using a newly developed two-phase flow analysis code and a highly parallel vector supercomputer. Conventional analysis methods need composition equations and empirical correlations based on the experimental data. In case that there are no experimental data for the advanced light water reactor, therefore, it is difficult to obtain high prediction accuracy. Then, a new two-phase flow analysis method based on the latest computational science was proposed. This paper describes the predicted bubbly flow behavior in a three-dimensional minichannel and the predicted void fractions in the simulated tight-lattice fuel bundle. Regarding the mechanism of bubble coalescence and fragmentation the useful knowledge was obtained.
社団法人日本機械学会の論文
2005-09-18