AVUS (Air Vehicles Unstructured Solver) from AFRL/VAAC is a finite volume unstructured-grid Euler/Navier-Stokes solver, and derived from Cobalt-60 by the same group. The fundamental algorithm of AVUS is the finite-volume, cell-centered, first-order accurate in space and time, exact Riemann solver of Godunov. AVUS can treat two-dimensional, axi-symmetric and three-dimensional problems. The grid can be composed of cells of arbitrary type,i.e, tetrahedra, quadrilaterals, pyramids, triangles,etc. Different cell types are permitted within the same grid. The set of boundaries forming each cell, called faces, can also be arbitrary (triangles, pentagons, lines,etc.), though each cell boundary face should be convex. Further, the grids may be decomposed into sub-domains, called groups or zones, permitting parallel processing where each zone resides on a separate processor.

AVUS has the ability to restart calculations from information saved to files.