[2H13-16] Severe Accident at Reprocessing Plant

[2H16] Enhancement of Analysis Method for Important Phenomenon of Severe accidents at Reprocessing Plant

(7)A structured adaptive mesh refinement methodology under generalized curvilinear coordinates to deal with non-Cartesian system for analysis of severe accidents

*A. Koichi Hayashi¹, Xinmeng Tang², Yoshikazu Tamauchi³, Takashi Kodama³, Nobuyuki Tsuboi⁴ (1. Aoyama Gakuin University, 2. Sophia Univ., 3. JFNL, 4. Kyushu Institute of Technology)

Keywords:Hydrogen explosion, Hydrogen explosion analysis for real size container, Structured adaptive mesh refinement method

In order to analyze hydrogen explosion in real size container, it should be solved two conflicting problems of reduction of computational cost and improvement of computational accuracy. To this end we have solve the following detailed problems: (1) reduce the total grid number of 3D real size container; (2) compute the combustion part of calculation accurately as possible; and (3) reduce the computational time of chemical reactions. At the presentation this time, in order to solve the problems (1) and (2), it will be talked how a structured adaptive mesh refinement method under generalized curvilinear coordinates can be used to deal with non-Cartesian system of severe accident problem.