Second-order wave maker theory using force-feedback control. Part I: A new theory for regular wave generation

Spinneken, Johannes; Swan, Chris

doi:10.1016/j.oceaneng.2009.01.019

Cited by 43 publications

(22 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…

AbstractThis paper provides an experimental verification of the new wave maker theory outlined by Spinneken & Swan (2008a). This theory concerns the generation of regular waves by a flap-type wave maker using force-feedback control, providing the first quantitative evidence of the inherent advantages of this latter approach.

…”

mentioning

confidence: 87%

“…In an earlier paper, hereafter referred to as part I, Spinneken & Swan (2008a) developed a second-order wave maker theory incorporating force-feedback control. The motivation for this work was the need for an improved understanding of wave generation, driven by a desire to accurately control the wave forms produced within a laboratory environment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Second-order wave maker theory using force-feedback control. Part II: An experimental verification of regular wave generation

Spinneken

Swan

2009

Ocean Engineering

Self Cite

View full text Add to dashboard Cite

“…

…”

mentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Second-order wave maker theory using force-feedback control. Part II: An experimental verification of regular wave generation

Spinneken

Swan

2009

Ocean Engineering

Self Cite

View full text Add to dashboard Cite

“…Taking each of these points in turn, the paddle calibration can either be empirical [37] or theoretical [44,45]; the latter approach has been adopted herein. In considering these approaches, it is important to stress that both represent an effective paddle calibration.…”

Section: (C) Calibration and Wave Generationmentioning

confidence: 99%

A laboratory study of wave crest statistics and the role of directional spreading

Latheef

Swan

2013

Proc. R. Soc. A.

View full text Add to dashboard Cite

This paper concerns the crest height statistics arising in sea states that are broad banded in both frequency and direction. A new set of laboratory observations are presented and the results compared with the commonly applied statistical distributions. Taken as a whole, the data confirm that the crest-height distributions are critically dependent upon the directionality of the sea state. Although nonlinear effects arising at third order and above are most pronounced in uni-directional seas, the present data show that they are also important in directionally spread seas, provided the seas are sufficiently steep and not too short crested. The data also highlight the limiting effects of wave breaking. With individual breaking events dependent upon the local wave steepness, the directionality of the sea state again plays a significant role. Indeed, the present observations confirm that the two competing processes of nonlinear amplification and wave breaking can have a profound influence on the crest-height distributions leading to significant departures from established theory. In such cases, the key parameters are the sea state steepness and directional spread; the latter acting to counter the former in terms of nonlinear changes in the crestheight distributions.

show abstract

“…This has already been discussed in Spinneken and Swan (2009b), but is included here for completeness. Within the analytical solution the wavemaker's angular displacement is defined as…”

Section: Appendix B -Hydrodynamic Coefficients Of a Flap-type Wavemakermentioning

confidence: 94%

Force-controlled absorption in a fully-nonlinear numerical wave tank

Spinneken

Christou

Swan

2014

Journal of Computational Physics

Self Cite

View full text Add to dashboard Cite

An active control methodology for the absorption of water waves in a numerical wave tank is introduced. This methodology is based upon a force-feedback technique which has previously been shown to be very effective in physical wave tanks. Unlike other methods, an a-priori knowledge of the wave conditions in the tank is not required; the absorption controller being designed to automatically respond to a wide range of wave conditions. In comparison to numerical sponge layers, effective wave absorption is achieved on the boundary, thereby minimising the spatial extent of the numerical wave tank. In contrast to the imposition of radiation conditions, the scheme is inherently capable of absorbing irregular waves. Most importantly, simultaneous generation and absorption can be achieved. This is an important advance when considering inclusion of reflective bodies within the numerical wave tank.In designing the absorption controller, an infinite impulse response filter is adopted, thereby eliminating the problem of non-causality in the controller optimisation. Two alternative controllers are considered, both implemented in a fully-nonlinear wave tank based on a multiple-flux boundary element scheme.To simplify the problem under consideration, the present analysis is limited to water waves propagating in a two-dimensional domain.

show abstract

Second-order wave maker theory using force-feedback control. Part I: A new theory for regular wave generation

Cited by 43 publications

References 20 publications

Second-order wave maker theory using force-feedback control. Part II: An experimental verification of regular wave generation

Second-order wave maker theory using force-feedback control. Part II: An experimental verification of regular wave generation

A laboratory study of wave crest statistics and the role of directional spreading

Force-controlled absorption in a fully-nonlinear numerical wave tank

Contact Info

Product

Resources

About