Also known as: mach.
MACH has various meanings in the Weather category. Discover the full forms, definitions, and usage contexts of MACH in Weather.
In fluid dynamics, the Mach number is a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound M=u/c where, M is the Mach number, u is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), and c is the speed of sound in the medium.
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