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Hydrodynamics of Local Tsunami Effects - Numerical and Scale Model Results Based on Laboratory Experiments at the University of Washington and Numerical Simulation at Southern Methodist University (National Science Foundation Grant CMS-9614120) 1957 Aleutian Tsunami Laie Point,
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Based on Laboratory Experiments at the University of Washington and Numerical Simulation at Southern Methodist University
(National Science Foundation Grant CMS-9614120)
Photos of incoming tsunami at La Manzanillo, Mexico on October 9, 1995 (Mw = 8.0)
Courtesy of J. Borrerro, USC
Pedestrians on seawall
1983 Sea of Japan Tsunami, (Video footage courtesy of NHK)
Puumaile Tuberculosis Hospital
1946 Aleutian tsunami in Hilo, Hawaii. 96 people died, $26 million damage.
(Photos courtesy of NGDC)
Kamehameha Ave., Hilo
about 200 mortalities
1960, Chilean tsunami (Mw = 8.6)
(photos courtesy of NGDC)
took the lives of 126 people and destroyed 671 structures.
(Photos courtesy of
Force Cell in Cylinder
Schematic of Experiment (all dimensions in cm)
Laser Light Sheet Images of Water Surface: Frames 15-18
Laser Light Sheet Images of Water Surface: Frames 19-22
Raw Data from Frame 19
Processed Data from Frame 19
Comparison: Lab Force Data with Three-Dimensional Surface Marker and Micro Cell (3DSMMC) Technique
Comparison: Lab Velocity Data with Three-Dimensional Surface Marker and Micro Cell (3DSMMC) Technique
Horizontal Velocity (m/s)
Linear Momentum: F = mvx = (Avx)vx
Drag Force: F = 1/2CDAvx2, CD = 2
1. Laboratory and numerical results confirm that the maximum force occurs when the area behind the bore head begins to impact the obstacle.
2. The 3DSMMC horizontal forces on the square obstacle and of the velocity field model gives an accurate prediction of the around the obstacle during the progression of the bore.
3. For the square obstacle facing into the flow, using the measured maximum velocity in the bore and either conservation of linear momentum or a drag force calculation yields a good first order estimate of the maximum force.
H. Yeh, C. Petroff and H. Arnason
Department of Civil & Environmental EngineeringUniversity of Washington, USA
R. Bidoae and P. Raad
Department of Mechanical Engineering
Southern Methodist University, USA