Autodesk Cfd 2021 Ultimate -

: Corrected repeatable crashes related to particle traces and improved the "Design Study Bar" navigation.

: Unlike lower tiers (historically), Ultimate includes tools for analyzing interactions between moving solid objects and surrounding fluids. Autodesk CFD 2021 Ultimate

For stable performance with the 2021 version, Autodesk suggests: Autodesk CFD Named User Subscription : Corrected repeatable crashes related to particle traces

: Capable of simulating liquid-gas interfaces, such as waves or sloshing. 2021 Performance & Updates Autodesk CFD 2021 Ultimate