N Body Simulation

This code simulates particles under self-gravity. The forces are calculated via direct summation or with a tree and multipole expansion.

In the branch "adaptive-timestepping" there is also an implementation that uses adaptive timestepping.

Most of the code is written in C++, Python is used to make plots and animations. OpenMP is used for parallelisation.

Install OpenMP

https://www.geeksforgeeks.org/openmp-introduction-with-installation-guide/

Clone repository

This will create a folder called nbody that contains everything.

git clone https://gitlab.uzh.ch/armindamon.riess/nbody.git

Make build directory

This requires cmake and make. Run it in the folder nbody.

mkdir build
cd build
cmake ..

Compiling and running the program

Go to the nbody/build directory and run these commands:

make
./nbody