cc-by-4.0Dahl, Jani2025-03-242024-01-292024-01-29https://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/9027This simulation code is used to conduct simulations of relativistic fluids with non-relativistic bulk velocities in three dimensions under the ultra-relativistic equation of state. The code has been used to conduct the simulations in the paper: Primordial acoustic turbulence: three-dimensional simulations and gravitational wave predictions by Jani Dahl, Mark Hindmarsh, Kari Rummukainen, and David Weir. For further information about the code, see the README.md file.Opensoftware