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You are here : eLibrary : IAHR World Congress Proceedings : 33rd Congress - Vancouver (2009) : Topic A: Advances in the Fundamentals of Water Science and Engineering : Application of particle image velocimetry in hydraulic engineering research
Application of particle image velocimetry in hydraulic engineering research
Author : Michael Horst
Particle Image Velocimetry (PIV) is a non-intrusive method used for ascertaining hydraulic information in a specific area of interest in either 2 or 3 dimensions. Using an illuminating light source, reflective particles, and a high speed camera, a time series of images in a specified area are captured and correlated thus producing a detailed representation of the flow field. Once the flow field is established, corresponding information such as velocity vectors, streamlines, and shear stresses, over a given duration can be calculated. This method of acquiring hydraulic information is proving vital for advancing the professions understanding of various hydraulic phenomenons, especially in and around hydraulic structures such as bridges, culverts, and guide-vanes used in stream restoration. The Federal Highway Administrationís Hydraulics Research Laboratory has been utilizing PIV as part of their experiments to assist in the design and analysis of various hydraulic structures. Situations which have been modeled include the development of the horseshoe vortex system at the base of piers, the wake vortex system on the downstream end of piers, the vena-contracta height of flow as it enters into box-culverts, the vortex system that forms downstream of guide-vanes used in stream restoration, and the turbulent shear profile at the outlet of culverts, among others. The purpose of this paper is to explain the technology of PIV and give a broad overview of the benefits of its application in hydraulic engineering research, as well as a summary of selected results from various experiments which have been performed using the technology.
File Size : 1,781,929 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 33rd Congress - Vancouver (2009)
Article : Topic A: Advances in the Fundamentals of Water Science and Engineering
Date Published : 09/08/2009
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