Mach number
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+ | The Mach number, <math>M</math>, is the local flow-speed, <math>u</math>, divided by the local | ||
+ | speed of sound, <math>a</math>: | ||
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+ | :<math>M \equiv \frac{u}{a} \equiv \frac{\mbox{local flow speed}}{\mbox{local speed of sound}}</math> | ||
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+ | The Mach number can be used to categorise a compressible flows into different [[Mach number regimes]] | ||
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+ | The name "Mach number" originates from the famous pioneer in compressible fluid dynamics [[Ernst Mach]] | ||
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[[Category: Dimensionless parameters]] | [[Category: Dimensionless parameters]] |
Revision as of 10:31, 13 September 2005
The Mach number, , is the local flow-speed, , divided by the local speed of sound, :
The Mach number can be used to categorise a compressible flows into different Mach number regimes
The name "Mach number" originates from the famous pioneer in compressible fluid dynamics Ernst Mach