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Transcript
Examples
Application to Saturn's Ring
Features
Modularity
Rebound
Oct-Tree
Fast and Accurate
O(N log(N))
Gravity
Easy to Get Started
Direct Summation
O(N^2)
Integrator
No Self-gravity
Leap frog
Second order
Collision
Visualization
Mixed variable symplectic integrator
Second order for
central force field
- Real-time 3D graphics using OpenGL
- PNG format image snapshots
- ASCII or binary files for other software
Symplectic Epicycle Integrator
Second order for shearing sheet
Oct-tree
O(N log(N))
Line sweep
Direct Search
for low dimensional problem O(N log(N))
No Collision
O(N^2)
Parallelized
with OpenMP and MPI
Self-gravitating disc
None self-gravitating disc
PIA12790: Sunlit Propeller
Shearing Sheet
CREDIT: NASA/JPL/SSI
y
planet
x
Hanno Rein
Shangfei Liu
KIAA, Peking University
IAS, Princeton
Rebound
An Open Source Collisional N-body Tree Code
http://github.com/hannorein/rebound
Shangfei Liu
KIAA, Peking Univ.
Aug 5th, 2011
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