[3G06-09] 先端シミュレーション

[3G06] An enhanced moving particle semi-implicit method for simulation of incompressible fluid flow and fluid-structure interaction

*Qinghang CAI^1,2, Seiichi KOSHIZUKA¹, Ronghua CHEN², Wenxi Tian², Suizheng QIU², Guanghui SU² (1. UTokyo, 2. XJTU)

キーワード：Particle method, Least squares MPS method, Elastic structure, Fluid–structure interaction, Fuel damage

Structure deformation and fluid-structure coupling are important problems in nuclear reactor safety analysis. An enhanced moving particle semi-implicit method for simulation of elastic structure deformation and FSI (Fluid-Structure Interaction) is developed. The elastic structure model adopts Lagrangian kernel function and is discretized in Lagrangian system to ensure that the simulation process is more in line with the physical reality and avoid tensile instability. And Euler kernel function is used in fluid calculation. The fluid-solid coupled process is realized by sharing the load, velocity and position information of the solid boundary. The developed models are verified by simulations of different problems, including the free oscillation of cantilever beam, violent sloshing test and dam break with elastic gate.