# Mach number

(Difference between revisions)
 Revision as of 10:31, 13 September 2005 (view source)Jola (Talk | contribs)← Older edit Revision as of 10:31, 13 September 2005 (view source)Jola (Talk | contribs) mNewer edit → Line 4: Line 4: :$M \equiv \frac{u}{a} \equiv \frac{\mbox{local flow speed}}{\mbox{local speed of sound}}$ :$M \equiv \frac{u}{a} \equiv \frac{\mbox{local flow speed}}{\mbox{local speed of sound}}$ - The Mach number can be used to categorise a compressible flows into different [[Mach number regimes]] + The Mach number can be used to categorise compressible flows into different [[Mach number regimes]] The name "Mach number" originates from the famous pioneer in compressible fluid dynamics [[Ernst Mach]] The name "Mach number" originates from the famous pioneer in compressible fluid dynamics [[Ernst Mach]] [[Category: Dimensionless parameters]] [[Category: Dimensionless parameters]]

## Revision as of 10:31, 13 September 2005

The Mach number, $M$, is the local flow-speed, $u$, divided by the local speed of sound, $a$:

$M \equiv \frac{u}{a} \equiv \frac{\mbox{local flow speed}}{\mbox{local speed of sound}}$

The Mach number can be used to categorise compressible flows into different Mach number regimes

The name "Mach number" originates from the famous pioneer in compressible fluid dynamics Ernst Mach