Schmied, SA and Binns, JR and Renilson, MR and Thomas, GA and MacFarlane, GJ and Huijsmans, R, The design limitations of a circular wave pool, ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, 8-13 June 2014, San Francisco, California, pp. 1-9. ISBN 978-0-7918-4550-9 (2014) [Refereed Conference Paper]
In this paper, the design of a circular wave pool that
produces continuously breaking waves is discussed, whereby a
pressure source is rotated within an annular wave pool. The
concept was that the pressure source generates non-breaking
waves that propagate inward to the inner ring of the annulus,
where a sloping bathymetry (beach) triggers wave breaking. In
order to refine the technique, research was conducted to better
understand the mechanics of waves generated by moving
pressure sources in a constrained waterway, the transformation
of these waves as they travel across the channel and the effect
of the sloping beach on the wave quality for surfing.
The quality of the waves was defined in terms of wave
height, speed and shape, with the aim to create plunging waves,
known as "barrels", that are highly desired by surfers.
A predominantly experimental approach was undertaken to
determine the required design parameter values and their
limitations. Scale model experimental results were previously
presented at OMAE 2011 and OMAE2013.
This paper presents the steps to design the pool using the
empirical analysis and experimental results are presented. The
effect of the pressure source and pool bathymetry on the
currents formed in the pool, are also presented. Through this
design process, high quality continuous breaking waves with
the desired plunging shape were able to be generated.
Finally, the authors are planning to use the facilities and
techniques developed to investigate the complexities of
predefined wave fields, including the three dimensional (3D)
details of the velocity, pressure and turbulence fields beneath.
Understanding these complexities within multidimensional
wave patterns is the key to analysing a number of different
fields, including wave resistance of ships; wave disturbances to
other maritime users; bank erosion; wave signal tracking; and
wave structure interaction.