The UA HPC offers free high performance computing resources in the Research Data Center (RDC), a state-of-the-art facility that hosts large computer clusters. Accounts are available for all University faculty for the purpose of research; faculty can sponsor accounts for staff, students, and visiting scholars. To get started, go to: https://it.arizona.edu/service/high-performance-computing or https://docs.hpc.arizona.edu/display/UAHPC/HPC+Documentation
LPL's Planetary Atmospheres Computing and Modeling ANalysis (PACMAN) is a 28-node (448-cpu) cluster. Pacman is available to the Barman and Showman research groups.
LPL's High Performance Astrophysics Simulator (HiPAS) is a 48-node (384-cpu) cluster. Hipas is available to the Giacalone, Jokipii, Malhotra, Showman, and Yelle research groups.
PIRL (Planetary Image Research Laboratory) HPC clusters are available for use by those who have a PIRL user account. To get started, go to: https://pirlwww.lpl.arizona.edu/wiki/resources