NEAR-SURFACE ORBITAL VELOCITIES IN IRREGULAR WAVES

Proceedings of the International Conference on Coastal Engineering

A. Gotschenberg¹  K.-F. Daemrich¹ 

[1] Franzius-Institut, University of Hannover

关键词: irregular wave;    orbital velocity;    near surface velocity;   

DOI  :  10.9753/icce.v20.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

The paper deals with measurements of horizontal orbital velocities near the surface of mechanically generated waves in a wave flume. Due to the characteristics of most velocity probes, it is difficult or impossible to measure with a fixed probe in the area above the lowest trough. As the probe is not submerged continuously, failures or uncertainties in the measurements may occur. To overcome these limitations, a movable frame for the velocity probe was designed, which can be moved vertically up and down with the surface elevation by a disc rotor servo motor, controlled by a wave gauge. By that continuously velocities up to 3 cm below the surface could be measured. Theoretical velocities have been calculated for comparison with different simulation methods for irregular waves, based on linear wave theory.

【 授权许可】

Unknown