Velocity, vorticity, and mach number

Beverley McKeon, Geneviève Comte-Bellot, John Foss, Jerry Westerweel, Fulvio Scarano, Cameron Tropea, James Meyers, Joseph Lee, Angelo Cavone, Richard Schodl, Manoochehr Koochesfahani, Yiannis Andreopoulos, Werner Dahm, John Mullin, James Wallace, Petar Vukoslavčević, Scott Morris, Eric Pardyjak, Alvaro Cuerva

Research output: Chapter in Book/Report/Conference proceedingChapter

36 Scopus citations


The objective of this chapter is to provide a comprehensive statement of the experimental methods that can be used to transduce the velocity and its companion quantity: vorticity (∇ × u¯). Velocity measurements can be understood to represent spatially integrated and pointwise values. Thermal transient anemometry (Sect. 5.6) and sonic anemometers (Sect. 5.7) represent the former. Pressure-based velocity measurements (Sect. 5.1), thermal anemometry (Sect. 5.2), and particle-based techniques (Sect. 5.3) represent the latter. In addition, particle image velocimetry (PIV, Sect. 5.3.2), planar Doppler velocimetry (Sect. 5.3.3), and molecular tagging velocimetry (Sect. 5.4) also provide spatial distributions of the pointwise measurements for the instant at which the image is formed. The vorticity measurements rely on some form of the above pointwise measurements. A general overview of optical methods is presented in Sect. 5.5.1.

Original languageEnglish (US)
Title of host publicationSpringer Handbooks
Number of pages257
StatePublished - 2007
Externally publishedYes

Publication series

NameSpringer Handbooks
ISSN (Print)2522-8692
ISSN (Electronic)2522-8706

ASJC Scopus subject areas

  • General


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