Ripple Morphology under Oscillatory Flow
Abstract
The long term goals of this research are to advance in the understanding of bed morphology and sediment dynamics under oscillatory flows; expand the present experimental database of sand bed configuration and evolution under controlled flow conditions in large scale facilities; and improve currently available tools for the prediction of bed configuration. This effort studies the final configuration that a uniform sand bed would take under a regular oscillatory water flow. In particular: the identification of dimensionless parameters controlling the occurrence of two or three dimensional ripples; the development of orbital, suborbital or anorbital ripples; and the occurrence of round crested ripples. Attention is also directed to the hydro- and sediment dynamics of the flow over self formed ripple. The work has three main components: (1) Literature review: which was necessary to detect the areas where experimental data was scarce and design the experimental program. It should also allow for the comparison of the new experimental results with the previously published data from both laboratory and field experiments by other researchers. (2) Expansion of the measuring capabilities at the existing facilities: new measuring equipment has been installed in both the Large Oscillatory Water Sediment Tunnel (LOWST) and the Large Wave Current Flume (LWCF). (3) Field scale experiments have been performed in both experimental facilities to address the above mention objectives. The LOWST dimensions, its 0.8 m width in particular, make it a unique facility for the study of three dimensional ripples.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2008
- Accession Number
- ADA514931
Entities
People
- Blake J. Landry
- Francisco Pedocchi
- Marcelo H. García
Organizations
- University of Illinois Urbana–Champaign