https://github.com/QirongZhu/taichi_collisional

n body code for star cluster simulations
https://github.com/QirongZhu/taichi_collisional

Last synced: 4 days ago
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n body code for star cluster simulations

• Host: GitHub
• URL: https://github.com/QirongZhu/taichi_collisional
• Owner: QirongZhu
• Created: 2019-09-26T01:13:47.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2023-02-27T02:53:41.000Z (over 1 year ago)
• Last Synced: 2024-10-30T19:12:58.387Z (8 days ago)
• Language: C++
• Size: 16 MB
• Stars: 4
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-taichi - Taichi collisional - An N-body code for star cluster simulations. (Applications / **Simulation**)
• awesome-taichi - Taichi collisional - An N-body code for star cluster simulations. (**Simulation**)

README

        
# taichi_collisional

An N-body code for star cluster simulations. The code uses an adaptive (octree) Fast Multipole Method to compute gravity, therefore $\mathcal{O}(N)$ instead of pairwise summations ($N^2$). The multipole-to-local (M2L) translations uses a $\mathcal{O}(p^3)$ method by rotating the multipoles in the direction of the seperation vector. The particle-to-particle kernel uses a vectorized version. For more details, see (Mukherjee 2021 ApJ, arxiv:2012.02207).

-Much of the code is based on exafmm (https://github.com/exafmm/exafmm). Solid spherical harmonics is adopted over the original formulation (See Dehnen 2014). 

-The master folder contains the code used in the ApJ paper.

-The speed folder includes a fourth-order integrator (arxiv:2011.14984), which improves the energy conservation. The gradient force is approximated using the extraplation method of Omelyan 2006. See also Farr2007.