Research Article
Jun 1976
Comparison of Single-Point Injections in Pipe Flow
Authors: Ahmet M. Ger and Edward R. Holley, M.ASCEAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 102, Issue 6
Abstract
For applications such as using tracer techniques for discharge measurements in pipes or using a segment of a pipe as a mixing chamber, it is desirable to know the rate at which the concentration of injected material becomes mixed within the pipe cross section. The distance required to achieve a given degree of mixing depends on the injection system and the pipe flow characteristics. The mixing for three single-point injection systems is compared. The three systems are a center line source, a wall source, and a jet at the wall issuing perpendicularly to the pipe flow. A center line source can provide the most rapid mixing, but it is extremely difficult to maintain the symmetry necessary to achieve the rapid mixing. The wall source gives the slowest mixing. The mixing for a jet injection depends on M, the ratio of the jet momentum to the pipe momentum. For a jet injection, there is an optimum M which gives the most rapid mixing for given flow characteristics, and this mixing is more rapid than either a wall source or most practically achievable center line sources.
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Published In
Journal of the Hydraulics Division
Volume 102 • Issue 6 • June 1976
Pages: 731 - 746
Copyright
© 1976 American Society of Civil Engineers.
History
Published in print: Jun 1976
Published online: Feb 3, 2021
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Authors
Affiliations
Ahmet M. Ger
Asst. Prof. of Civ. Engrg., Middle East Technical Univ., Ankara, Turkey
Edward R. Holley, M.ASCE
Prof. of Civ. Engrg., Univ. of Illinois, Urbana, Ill
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.