This is an open-source code to compute the non-linear evolution of the cosmological matter density contrast. It is based on the Particle Mesh (PM) technique. It is written in C. The code has been parallelized (Mondal et al. 2015) for shared-memory machines using Open Multi-Processing (OpenMP).
Read the user's guide 'nbody_doc.pdf' for a detailed description.
Requirments for Running the program on debian based system.
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FFTW -3 installation command sudo apt-get install -y fftw3
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Make and gcc sudo apt-get install -y make gcc
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Git to downlnload the code sudo apt-get git
Single line of code for compleat setup: sudo apt update && sudo apt install git make gcc fftw3
installing fftw3 curl https://www.fftw.org/fftw-3.3.10.tar.gz --output fftw-3.3.10.tar.gz tar -zxvf fftw-3.3.10.tar.gz cd fftw-3.3.10
./configure --enable-float --enable-threads --enable-openmp make make install
Download the code by cloning the git repository using
$ git clone https://github.com/rajeshmondal18/N-body.git
You need to install FFTW-3.x.x with the following flags: '--enable-float', '--enable-threads' and '--enable-openmp' to compile this set of codes. Look at the installation instruction http://www.fftw.org/fftw3_doc/Installation-on-Unix.html#Installation-on-Unix
Use the makefile for compilation in the following manner:
$ make nbody_comp
It will create the executable 'nbody_comp'.
To Run:
$ ./nbody_comp
Please acknowledge these papers
- Bharadwaj and Srikant 2004 (http://adsabs.harvard.edu/abs/2004JApA...25...67B), if you are using the serial version of the code
- Mondal et al. 2015 (http://adsabs.harvard.edu/abs/2015MNRAS.449L..41M), if you are using the current parallelized version of the code.