Extreme Velocity Fluctuations below Free Hydraulic Jumps
Author
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-02
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Abstract EN
The internal flow of hydraulic jump is essentially an unsteady flow subjected to macroturbulent random fluctuations, and it was not known enough.
Then, for the fluctuating motion interpretation, the experimental research on the associated turbulence must be necessary.
The author developed in the past extensive laboratory research for the instantaneous pressure field determination by means of pressure transducers and new introductory experiments on velocity fluctuations by means of the ADV technique.
The experimental study of the instantaneous pressure field was based on the knowledge of several statistical parameters of amplitudes and frequencies as functions of the Froude number, but for this paper the maximum instantaneous negative of pressure amplitudes on the floor is considered, in order to estimate the extreme maximum positive velocities near the bottom.
A useful relationship between turbulence intensity and the pressure fluctuation coefficient Cp′ was proposed from ADV velocity fluctuation for low incident Froude numbers.
By means of this relationship, the value u0,1%′ (instantaneous positive semiamplitude with 0.1% of probability to be surpassed) can be considered for the determination of the turbulent extreme velocity near the bottom, under a free hydraulic jump stilling basin with incident Froude number 3
American Psychological Association (APA)
Lopardo, Raúl Antonio. 2013. Extreme Velocity Fluctuations below Free Hydraulic Jumps. Journal of Engineering،Vol. 2013, no. 2013, pp.1-5.
https://search.emarefa.net/detail/BIM-489729
Modern Language Association (MLA)
Lopardo, Raúl Antonio. Extreme Velocity Fluctuations below Free Hydraulic Jumps. Journal of Engineering No. 2013 (2013), pp.1-5.
https://search.emarefa.net/detail/BIM-489729
American Medical Association (AMA)
Lopardo, Raúl Antonio. Extreme Velocity Fluctuations below Free Hydraulic Jumps. Journal of Engineering. 2013. Vol. 2013, no. 2013, pp.1-5.
https://search.emarefa.net/detail/BIM-489729
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-489729