Edge scour in current adjacent to stone covers

Thor Ugelvig Petersen, B. Mutlu Sumer, Knud Erik Meyer, Jørgen Fredsøe, Erik Damgaard Christensen

Research output: Contribution to conferencePaperResearchpeer-review

Abstract

The present paper reports some early results of an experimental investigation of edge scour in currents.
Two kinds of measurements are made (1) Particle Image Velocimetry (PIV) measurements of secondary
currents that take place near a junction between the stone cover and the sand bed in a clear-water
experiment; and (2) scour measurements in actual scour experiment in the live-bed regime.
The early results indicate that edge scour in a steady current propagating in-line with a stone layer is
caused by the combined action of two effects; (1) Primary flow and (2) Secondary flow. The primary flow
stirs up the sediment and puts into suspension, and the secondary flow carries it away from the junction
between the stone layer and the sand bed, resulting in a scour hole forming adjacent to the toe of the stone
layer.
Original languageEnglish
Publication date2012
Number of pages8
Publication statusPublished - 2012
EventICSE-6: 6th International Conference on Scour and Erosion - Paris, France
Duration: 27 Aug 201231 Aug 2012

Conference

ConferenceICSE-6
Country/TerritoryFrance
CityParis
Period27/08/201231/08/2012

Bibliographical note

ICSE6-042.

Keywords

  • Edge scour
  • Cover stones
  • Steady current
  • Scour protection
  • Coastal structures
  • Offshore structures
  • Scour
  • Offshore wind farm

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