Improvement of Basic Fluid Dynamics Models for the COMPASS Code

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概要

• 論文の詳細を見る

• The COMPASS code is a new next generation safety analysis code to provide local information for various key phenomena in core disruptive accidents of sodium-cooled fast reactors, which is based on the moving particle semi-implicit (MPS) method. In this study, improvement of basic fluid dynamics models for the COMPASS code was carried out and verified with fundamental verification calculations. A fully implicit pressure solution algorithm was introduced to improve the numerical stability of MPS simulations. With a newly developed free surface model, numerical difficulty caused by poor pressure solutions is overcome by involving free surface particles in the pressure Poisson equation. In addition, applicability of the MPS method to interactions between fluid and multi-solid bodies was investigated in comparison with dam-break experiments with solid balls. It was found that the PISO algorithm and free surface model makes simulation with the passively moving solid model stable numerically. The characteristic behavior of solid balls was successfully reproduced by the present numerical simulations.

• 一般社団法人 日本機械学会の論文

著者

• Zhang Shuai

  Department Of Applied Quantum Physics And Nuclear Engineering Graduate School Of Engineering Kyushu

• Morita Koji

  Department Of Anesthesiology And Intensive Care Hamamatsu University School Of Medicine

• SHIRAKAWA Noriyuki

  The Institute of Applied Energy

• YAMAMOTO Yuichi

  Japan Systems Corporation

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