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Mach wave

   Also found in: Wikipedia 0.04 sec.
Mach wave [′mäk ‚wav]
(fluid mechanics)
Also known as Mach line.
A shock wave theoretically occurring along a common line of intersection of all the pressure disturbances emanating from an infinitesimally small particle moving at supersonic speed through a fluid medium, with such a wave considered to exert no changes in the condition of the fluid passing through it.
A very weak shock wave appearing, for example, at the nose of a very sharp body, where the fluid undergoes no substantial change in direction.


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