No. 18 (1982), Conference Proceedings
No. 18 (1982)

WAVE INDUCED VELOCITIES CLOSE TO A RIPPLED BED

Conference Proceedings
Published 1982-01-29
C.G. du Toit
Department of Civil Engineering, University of Stellenbosch
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Keywords

ripples
bed
wave induced velocity

How to Cite

WAVE INDUCED VELOCITIES CLOSE TO A RIPPLED BED. (1982). Coastal Engineering Proceedings, 1(18), 21. https://doi.org/10.9753/icce.v18.21
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Abstract

The results are reported of velocity measurements in oscillatory flow over rippled beds. Velocities were measured with a laserdoppler anemometer in both an oscillating tray rig and an oscillatory flow U-tube. Both self-formed and artificial ripples were examined. The results obtained in the two test rigs were compared and it was concluded that the flow fields obtained in the two cases were dynamically similar. Measurements of the flow field clearly showed the formation, growth and ejection of vortices, as well as a strong surge of fluid over the ripples during and after flow reversal.
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