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n. (used with a sing. verb)
The branch of dynamics that deals with the motion of gases and the thermal effects of this motion.

gas′dy·nam′ic adj.
References in periodicals archive ?
Objective: The expansion of a dilute gas through a gasdynamics convergent-divergent nozzle can occur in three different regimes, depending on the inlet and discharge conditions and on the gas: via a fully subsonic expansion, via a subsonic-supersonic or via a subsonic-supersonic-subsonic expansion embedding a compression shock wave within the divergent portion of the nozzle.
They've also partnered with the Stanford High Temperature Gasdynamics Lab and the Flow Physics and Computational Engineering group to develop a number of new techniques to validate how they build physical models into the PSAAP computer code, Moin added.
These included external, internal, intermediate and terminal ballistics; heat transfer and erosion in gun-barrels; gasdynamics and effects of explosions; theories of damage; detonation and combustion; thermodynamics of solids and liquids under extreme conditions, etc.
However, when the upward motion of the rarefied gas from the inside is considered, the more elaborated dynamic equilibrium must be approached by the rules of gasdynamics, although its roots remain in the realm of crude Archimede's principle.