Bed Morphology and Sediment Transport Under Oscillatory Flow
Pedocchi Miljan, Francisco
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https://hdl.handle.net/2142/83411
Description
Title
Bed Morphology and Sediment Transport Under Oscillatory Flow
Author(s)
Pedocchi Miljan, Francisco
Issue Date
2009
Doctoral Committee Chair(s)
Garcia, Marcelo H.
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Geological
Language
eng
Abstract
The experiments focused on two aspects of the bed morphology: the study of the ripple planform geometry under a broad range of flow conditions, and the effect of orbital velocities on the ripple size under long water excursions. Regarding the planform geometry of the ripples, the results showed that narrow facilities restrict the three-dimensional development of bedforms. For the case of the long water excursion experiments, the ripple size was found to initially decrease as the maximum orbital velocity was increased, as it has been reported by other authors. However, as the maximum orbital velocity was further increased anorbital ripples did not develop and instead the ripples started to increase their size. These last ripples had round crests, and do not seem to belong to the same bedform class as the sharp crested ripples usually reported in the literature.
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