About
Hydra is an N-body hydrodynamics code which uses a combination of Adaptive PPPM for the gravity and Smoothed Particle Hydrodynamics for the gas forces.
The code evolves a mixture of purely gravitational and gas particles. It begins with a box containing a large number of uniformly distributed particles whose positions and velocities are perturbed in a physically motivate manner and then the motion of every particle is followed through time.
Reference
The initial paper for “The Hydra code” has been published as Couchman et al. 1995. For more information please contact Hugh Couchman.