2:30 PM - 2:45 PM
[MGI35-04] Development of N-body Simulation Code for Planetary System Formation With Particle-Particle Particle-Tree Scheme
Keywords:N-body simulation, planetary system formation
We have developed a new N-body simulation code with particle-particle particle-tree (P3T) scheme for planetary system formation, GPLUM. The code GPLUM uses a fourth-order Hermite scheme to calculate gravitational interactions between particles within a cut-off radius and a Barnes-Hut tree scheme for gravitational interactions from particles beyond. The conventional simulation codes with P3T scheme has the bottleneck that the calculation speed decreases when the mass ratio among the particles becomes large. We have solved it by implementing an algorithm which determines the cut-off radius based on mass and orbital semi-major axis of particles individually for each particle. The performance of GPLUM is significantly improved for the simulations of particle systems with mass distribution.
By improving the performance of the N-body simulation code, we made it possible to carry out numerous global simulation with various parameters. GPLUM allows us to perform N-body simulations with ~106-107 particles. By using GPLUM, we will perform N-body simulations with wide range and high resolution and investigate various parameters by perform parameter studies with N-body simulations.