Strategies for imaging flow fields with particle image velocimetry

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Particle image Velocimetry makes it possible to observe velocity fields on spatial scales over more than two decades. Standard practice consists of measurements of two-dimensional vectors on planar domains. At the other extreme, holographic methods can measure three dimensional vector fields in volumetric domains, potentially with time variation. However, because of limitations on the capacity of optical information storage and the transfer rate of data from the storage media, it is often advantageous to make less ambitious measurements on partial domains. Various techniques can be used to optimize the trade-offs. Video recording gives less resolution than photographic or holographic recording, but this reduction in resolution also makes it possible to obtain time series vector fields. Several techniques are available to obtain partial information in space. Stereo PIV measures three-dimensional vectors on planar domains. Two stereographic systems will be described: a photographic system that gives high resolution, and a vide-based system that gives several thousand frames of three-dimensional vector field data for ensemble averaging over numbers of data large enough to result in stable statistics. Volumetric measurements can also be obtained in a variety of techniques. Stereo PIV on multiple light sheet claims obtained by standing light sheet can be used to achieve pseudo-instantaneous measurements of the three-dimensional field. Photogrammetric methods for tracking relatively small numbers of particles over volumes can be used when high spatial resolution is not required. Holographic recording of entire volumes of particles provide the most information but suffer from some limitations such as information saturation on the hologram when the number of particles becomes too large. Techniques for reducing the effects of saturation are also available, including the use of multiple parallel thin illuminating light sheets to obtain highly resolved inplane measurements of selected parallel planes, or thick light sheets to obtain three-dimensional fields in a slab, thereby permitting the measurement of velocity derivatives in all directions.

Original languageEnglish (US)
Title of host publication1996 Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-11
Number of pages11
StatePublished - 1996
Externally publishedYes
EventFluid Dynamics Conference, 1996 - New Orleans, United States
Duration: Jun 17 1996Jun 20 1996

Other

OtherFluid Dynamics Conference, 1996
CountryUnited States
CityNew Orleans
Period6/17/966/20/96

Fingerprint

Velocity measurement
Flow fields
Imaging techniques
Video recording
Holograms
Time series
Statistics
Derivatives
Data storage equipment

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Adrian, R. (1996). Strategies for imaging flow fields with particle image velocimetry. In 1996 Fluid Dynamics Conference (pp. 1-11). American Institute of Aeronautics and Astronautics Inc, AIAA.

Strategies for imaging flow fields with particle image velocimetry. / Adrian, Ronald.

1996 Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, 1996. p. 1-11.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Adrian, R 1996, Strategies for imaging flow fields with particle image velocimetry. in 1996 Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, pp. 1-11, Fluid Dynamics Conference, 1996, New Orleans, United States, 6/17/96.
Adrian R. Strategies for imaging flow fields with particle image velocimetry. In 1996 Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA. 1996. p. 1-11
Adrian, Ronald. / Strategies for imaging flow fields with particle image velocimetry. 1996 Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, 1996. pp. 1-11
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