Particle Trajectories and Mass Transports of Progressive Gravity Waves
Date Issued
2010
Date
2010
Author(s)
Chen, Li-Wen
Abstract
Using the PIV system and image-connection technique. The properties of monochromatic frequency wave for the cases varying from deep water to intermediate water depths were studied. The effects of wave nonlinearity on the mean drift velocity, kinetic energy and potential energy were investigated. Wave velocity field and particle trajectory were calculated based on the analysis of the particle motion on recorded images. This study using reconstruction and temporal filtering analyzed flow field, the result was better than Voronoï construction’s. It was found that positive mean drift velocities exist near the free surface and the bottom of the flume and negative drift velocity occurs in between. In general, a negative drift velocity was found in most cases and the magnitude of the drift velocity increases with wave nonlinearity. The measured kinetic energy and potential energy was also found to be nearly the same.
Subjects
PIV measurement system
particle trajectory
mass transport
drift velocity
kinetic energy
potential energy
Trajectory reconstruction and temporal filtering
Vorono?construction
Type
thesis
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