5:15 PM - 6:30 PM
[MGI22-P01] Toward N-Body calculations with a larger number of particles : parallel computation for Particle-Particle Particle-Tree scheme using FDPS
Keywords:n-body simulations, planetary formation, planetesimals
Therefore, we have developed a parallel implementation of P3T(Particle-Particle Particle-Tree) scheme, which reduces the calculation cost from O(N2) to O(N log N).
In P3T scheme, the gravitational force between two particles is split into short-range and long-range contributions. Short-range forces are evaluated by direct summation and integrated with the fourth order Hermite scheme with the block time steps. For long-range forces, we use a combination of Tree code and the leapfrog integrator with the constant time steps. Using this scheme, we can calculate N-Body problems accurately in low calculation cost of O(N log N). In order to accelerate P3T scheme by parallel computation, we use FDPS(Framework for Developing Particle Simulator) which is a library to process the tree part at high speed.
In this talk, we show that it is possible to perform N-Body calculations for planet formation with a larger number of particles than those in the previous studies by parallel computation with P3T scheme using FDPS.