CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Wiki > Mach number

Mach number

From CFD-Wiki

(Difference between revisions)
Jump to: navigation, search
m
Line 4: Line 4:
:<math>M \equiv \frac{u}{a} \equiv \frac{\mbox{local flow speed}}{\mbox{local speed of sound}}</math>
:<math>M \equiv \frac{u}{a} \equiv \frac{\mbox{local flow speed}}{\mbox{local speed of sound}}</math>
-
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

My wiki