The simulation code GIZMO is a flexible, massively-parallel, multi-method multi-physics code, with a wide range of different physics modules described in the Feature Set section of the User Manual. The code is descended from P-GADGET, itself descended from GADGET–2, and is fully compatible with GADGET analysis codes, initial conditions, and snapshots. GIZMO is not an acronym – it refers both to the code’s multi-purpose applications and to its historical relationship to GADGET.
GIZMO is a flexible, massively-parallel, multi-physics simulation code. The code lets you solve the fluid equations using a variety of different methods – whatever is best for the problem at hand. It introduces new Lagrangian Godunov-type methods that allow you to solve the fluid equations with a moving particle distribution that is automatically adaptive in resolution and avoids the advection errors, angular momentum conservation errors, and excessive diffusion problems that limit the applicability of “adaptive mesh” (AMR) codes, while simultaneously avoiding the low-order errors inherent to simpler methods like smoothed-particle hydrodynamics (SPH). Meanwhile, self-gravity is solved fast, with fully-adaptive gravitational softenings. And the code is massively parallel — it has been run on everything from a Mac laptop to >1 million CPUs on national supercomputers.
The code is originally descended from GADGET, and has retained many naming/use conventions as well as input/output cross-compatibility — if you have code or experience from GADGET, it should immediately be compatible with GIZMO.
Some of the physics modules in GIZMO include:
For the details of the code and instruction for installation please see User Manual