Compressible flow requires the integration of the equations of conservation of mass and momentum with that of energy conservation. These three conservation requirements are closely coupled to each other in a way that increases the complexity of the problem. Also, the energy conservation equation explicitly incorporates thermodynamic properties of the fluid. A result of this is there is no general solution to such flows, and we resort instead to simple flows, such as unsteady one-dimensional and steady two-dimensional inviscid flows of perfect gases having constant specific heats.
See also: Compressed, Fluids.
Subjects: Aerodynamics Physics