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Difference between revisions of "Mach number"

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One of the basic criteria of aerodynamic similarity when the viscosity of the gas cannot be neglected. Mach's number <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/m/m062/m062020/m0620201.png" /> is the ratio of the velocity of the gas flow and the velocity of sound at the same point of the flow (or the ratio of the velocity of a body in the gas and the velocity of sound in this medium). The number was called thus to honour E. Mach.
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One of the basic criteria of aerodynamic similarity when the viscosity of the gas cannot be neglected. Mach's number $M=v/a$ is the ratio of the velocity of the gas flow and the velocity of sound at the same point of the flow (or the ratio of the velocity of a body in the gas and the velocity of sound in this medium). The number was called thus to honour E. Mach.
  
  

Revision as of 07:30, 15 July 2014

One of the basic criteria of aerodynamic similarity when the viscosity of the gas cannot be neglected. Mach's number $M=v/a$ is the ratio of the velocity of the gas flow and the velocity of sound at the same point of the flow (or the ratio of the velocity of a body in the gas and the velocity of sound in this medium). The number was called thus to honour E. Mach.


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References

[a1] L. Howarth (ed.) , Modern development in fluid dynamics. High speed flow , 1–2 , Oxford Univ. Press (1953)
How to Cite This Entry:
Mach number. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Mach_number&oldid=32439
This article was adapted from an original article by BSE-3 (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article