Author(s): Dimitris Stagonas; Peter Frohle; Gerald Muller
Linked Author(s):
Keywords: Wave mapping; Wave fields; Random seas; Micro modelling
Abstract: Micro models of wave fields, i. e. models with geometric scales of 1: 100 to 1: 1000, could allow for the small scale preparation of large scale tests as well as for the modeling of large areas. A cooperative research project of the Universities of Southampton / UK and Rostock / Germany aims at the assessment of possibilities and limitations of wave field micro models and the development of novel measurement techniques for wave field mapping. It was found that for wave periods of 0. 3 seconds and less, in combination with water depths of 25 mm or less strong attenuation occurs; these values can be regarded as the lower limits for wave modeling. A wave mapping technique for regular waves which employs PIV surface particle measurements from which wave heights are inferred using linear wave theory was developed. Using a theoretical model, the technique was expanded to include random seas. The technique was then experimentally validated. The method gave acceptable results and makes it possible to map random wave fields in the space and time domain under laboratory conditions.
Year: 2007