The solver is a scalable, multilevel solver for Euler equations governing the inviscid flow of a compressible fluid. Meshes from ANSYS ICEM CFD Cart3D are treated as unstructured collections of Cartesian cells; the technology leverages Cartesian cells wherever possible to reduce the operation count.
ANSYS ICEM CFD Cart3D uses full approximation storage (FAS) multi-grid for convergence acceleration. It uses a domain decomposition approach to parallelization. As a result, scalability on large numbers of processors is quite good. Speedups in excess of 56 on 64 processors are typical.