Home - cmyoo/cosmos GitHub Wiki

Welcome to the cosmos wiki! COSMOS is an open-source code for numerical relativity specialized for PBH formation. It is originally translated from SACRA code [Tetsuro Yamamoto, Masaru Shibata, Keisuke Taniguchi(arXiv:0806.4007)] into C++.

How to make a new own project?

• There are only three steps to start the simplest project written in Getting Started.
• After checking out the simplest case, please see some actual Examples.

COSMOS for 3+1 dim simulations

• https://github.com/cmyoo/cosmos
• Perfect fluid with linear equation of states & massless scalar field
• Non-Cartesian scale-up coordinates
• Fixed mesh refinement
• OpenMP parallelization

COSMOS-S for 1+1 spherical simulations

• https://github.com/cmyoo/cosmos-s
• Derived from COSMOS with CARTOON method (all items listed above are inherited)

Samples for test runs in COSMOS (3+1 dimensional simulation)

• Evolution of a single-mode perturbation
• Adiabatic spherically symmetric initial fluctuation
• Spherically symmetric iso-curvature