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| Titel |
A simple measuring technique of surface flow velocity to analyze the behavior of velocity fields in hydraulic engineering applications. |
| VerfasserIn |
Jackson Tellez, Manuel Gomez, Beniamino Russo, Jose M. Redondo |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250114762
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| Publikation (Nr.) |
 EGU/EGU2015-15577.pdf |
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| Zusammenfassung |
| An important achievement in hydraulic engineering is the proposal and development
of new techniques for the measurement of field velocities in hydraulic problems.
The technological advances in digital cameras with high resolution and high speed
found in the market, and the advances in digital image processing techniques now
provides a tremendous potential to measure and study the behavior of the water surface
flows.
This technique was applied at the Laboratory of Hydraulics at the Technical University of
Catalonia – Barcelona Tech to study the 2D velocity fields in the vicinity of a grate inlet. We
used a platform to test grate inlets capacity with dimensions of 5.5 m long and 4 m wide
allowing a zone of useful study of 5.5m x 3m, where the width is similar of the urban road
lane. The platform allows you to modify the longitudinal slopes from 0% to 10% and
transversal slope from 0% to 4%. Flow rates can arrive to 200 l/s. In addition a high
resolution camera with 1280 x 1024 pixels resolution with maximum speed of 488 frames per
second was used.
A novel technique using particle image velocimetry to measure surface flow velocities
has been developed and validated with the experimental data from the grate inlets
capacity.
In this case, the proposed methodology can become a useful tools to understand the
velocity fields of the flow approaching the inlet where the traditional measuring equipment
have serious problems and limitations.
References
DigiFlow User Guide. (2012), (June).
Russo, B., Gómez, M., & Tellez, J. (2013). Methodology to Estimate the Hydraulic
Efficiency of Nontested Continuous Transverse Grates. Journal of Irrigation and Drainage
Engineering, 139(10), 864–871. doi:10.1061/(ASCE)IR.1943-4774.0000625
Teresa Vila (1), Jackson Tellez (1), Jesus Maria Sanchez (2), Laura Sotillos (1), Margarita
Diez (3, 1), and J., & (1), M. R. (2014). Diffusion in fractal wakes and convective thermoelectric
flows. Geophysical Research Abstracts - EGU General Assembly 2014. RetrievedJanuary 07,
2015, from http://meetingorganizer.copernicus.org/EGU2014/EGU2014-1204.pdf |
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