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JDR Vol.4 No.6 pp. 391-403
(2009)
doi: 10.20965/jdr.2009.p0391

Paper:

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Tsunami Bore Impingement onto a Vertical Column

Halldor Arnason*, Catherine Petroff**, and Harry Yeh***

*Verkis Consulting, Armuli 4, 108 Reykjavik, Iceland

**LP4 Associates LLC, P.O. Box 1331, Mercer Island, WA, 98040, USA

***School of Civil & Construction Engineering, Oregon State University 220 Owen Hall, Corvallis, OR 97331-3212, USA

Received:
June 25, 2009
Accepted:
August 14, 2009
Published:
December 1, 2009
Creative Commons License
Keywords:
tsunamis, bore, wake, turbulence, force, method of characteristics, cylinder, column
Abstract
In a laboratory wave tank, bores were generated by dam-break: by lifting a gate that initially separated quiescent shallow water from a volume of impounded water. The study was motivated by the problem of tsunami-structure interaction and sought to further the understanding of interactions between the bore-like flow of a broken tsunami wave and structures of different cross sections. Experiments were designed to observe the structure’s effect on the bore as well as the bore’s effect on the structure. This comprehensive study used highly repeatable experiments to measure water-surface variations, velocity flow fields, and forces exerted by bores on vertically erected columns. The temporal and spatial variations of the water-surface elevations were quantified with a Laser-Induced Fluorescence (LIF) technique; velocity flow fields were recorded with a combination of Laser Doppler Velocimeter (LDV) and Digital Particle Image Velocimetry (DPIV); forces on the columns were measured with a miniature load-cell transducer. The laboratory data obtained in the study are available for validating numerical models that predict forces on structures in unsteady flows.
Cite this article as:
H. Arnason, C. Petroff, and H. Yeh, “Tsunami Bore Impingement onto a Vertical Column,” J. Disaster Res., Vol.4 No.6, pp. 391-403, 2009.
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