Journal article
Similitude of Large-Scale Turbulence in Experiments on Local Scour at Cylinders
Journal of hydraulic engineering (New York, N.Y.), Vol.132(1), pp.33-40
01/2006
DOI: 10.1061/(ASCE)0733-9429(2006)132:1(33)
Abstract
The writers’ experiments on local scour at vertical cylinders placed in a sand bed show that similitude of large-scale turbulence is an important consideration influencing equilibrium depth of local scour. For the range of cylinder diameters used in their experiments, the writers identify a direct trend between equilibrium scour depth (normalized with cylinder diameter) and the intensity and frequency of large-scale turbulence shed from each cylinder; values of normalized scour depth increased when cylinder diameter decreased. The writers offer a scour-depth adjustment factor to account for this trend, which essentially is a scale effect incurred with experiments involving three independent length scales: cylinder diameter, bed-particle diameter, and flow depth. The consequent similitude consideration, or scale effect, has general significance for laboratory studies of local scour associated with hydraulic structures in sediment beds.
Details
- Title: Subtitle
- Similitude of Large-Scale Turbulence in Experiments on Local Scour at Cylinders
- Creators
- Robert Ettema - University of IowaGokhan Kirkil - University of IowaMarian Muste - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of hydraulic engineering (New York, N.Y.), Vol.132(1), pp.33-40
- Publisher
- American Society of Civil Engineers
- DOI
- 10.1061/(ASCE)0733-9429(2006)132:1(33)
- ISSN
- 0733-9429
- eISSN
- 1943-7900
- Language
- English
- Date published
- 01/2006
- Academic Unit
- IIHR--Hydroscience and Engineering; Geographical and Sustainability Sciences
- Record Identifier
- 9984460341902771
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