It is also used as a cooling medium for nuclear reactors, and as a gas for supersonic wind tunnels.
The report explains; The development and use of cryogenic wind tunnels represents a major advance in aerodynamics testing.
Squire, L.C. A review of the role of some small high-speed wind tunnels in aeronautical research.
One is simulating wind and wind resistance and airflow dynamics on proposed vehicle designs, with virtual wind tunnels rapidly becoming a reality.