Abstract
The separation of boundary layer occurs periodically near a breaking point when incident waves climbing up a sloping bed are about to break. Not the breaker but the separation forms an unsteady coherent eddy, which suspends a large amount of bed material. A row of steady vortices has been found along the water surface of an offshore zone. Its formation is due to the shear instability between shoreward steady flow induced near the bed and offshore steady flow near the water surface. Moving in the offshore direction, the steady vortices repeat amalgamation each other and increase their intervals at the order of mean water depth. They decay after reaching to the region where the shear rate is not enough between the two steady flows. This shear instability may be excited by the periodic separation of boundary layer.
| Original language | English |
|---|---|
| Title of host publication | Twenty First Coastal Eng Conf |
| Publisher | Publ by ASCE |
| Pages | 234-245 |
| Number of pages | 12 |
| ISBN (Print) | 0872626873 |
| Publication status | Published - Dec 1 1988 |
| Event | Twenty-First Coastal Engineering Conference - Costa del Sol, Malaga, Spain Duration: Jun 20 1988 → Jun 25 1988 |
Publication series
| Name | Twenty First Coastal Eng Conf |
|---|
Other
| Other | Twenty-First Coastal Engineering Conference |
|---|---|
| City | Costa del Sol, Malaga, Spain |
| Period | 6/20/88 → 6/25/88 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
Coherent eddies induced by breakers on a sloping bed. / Matsunaga, Nobuhiro; Takehara, Kosei; Awaya, Yoichi.
Twenty First Coastal Eng Conf. Publ by ASCE, 1988. p. 234-245 (Twenty First Coastal Eng Conf).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Coherent eddies induced by breakers on a sloping bed
AU - Matsunaga, Nobuhiro
AU - Takehara, Kosei
AU - Awaya, Yoichi
PY - 1988/12/1
Y1 - 1988/12/1
N2 - The separation of boundary layer occurs periodically near a breaking point when incident waves climbing up a sloping bed are about to break. Not the breaker but the separation forms an unsteady coherent eddy, which suspends a large amount of bed material. A row of steady vortices has been found along the water surface of an offshore zone. Its formation is due to the shear instability between shoreward steady flow induced near the bed and offshore steady flow near the water surface. Moving in the offshore direction, the steady vortices repeat amalgamation each other and increase their intervals at the order of mean water depth. They decay after reaching to the region where the shear rate is not enough between the two steady flows. This shear instability may be excited by the periodic separation of boundary layer.
AB - The separation of boundary layer occurs periodically near a breaking point when incident waves climbing up a sloping bed are about to break. Not the breaker but the separation forms an unsteady coherent eddy, which suspends a large amount of bed material. A row of steady vortices has been found along the water surface of an offshore zone. Its formation is due to the shear instability between shoreward steady flow induced near the bed and offshore steady flow near the water surface. Moving in the offshore direction, the steady vortices repeat amalgamation each other and increase their intervals at the order of mean water depth. They decay after reaching to the region where the shear rate is not enough between the two steady flows. This shear instability may be excited by the periodic separation of boundary layer.
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UR - http://www.scopus.com/inward/citedby.url?scp=0024169094&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0024169094
SN - 0872626873
T3 - Twenty First Coastal Eng Conf
SP - 234
EP - 245
BT - Twenty First Coastal Eng Conf
PB - Publ by ASCE
ER -