Next Article in Journal
Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen
Next Article in Special Issue
Evaluation of Ecosystem Services in the Dongting Lake Wetland
Previous Article in Journal
Arsenic Removal from Water by Green Synthesized Magnetic Nanoparticles
Previous Article in Special Issue
Numerical Simulation of Non-Homogeneous Viscous Debris-Flows Based on the Smoothed Particle Hydrodynamics (SPH) Method
Open AccessArticle

An Experimental Study of Focusing Wave Generation with Improved Wave Amplitude Spectra

1
Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
2
College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2521; https://doi.org/10.3390/w11122521
Received: 15 October 2019 / Revised: 25 November 2019 / Accepted: 26 November 2019 / Published: 28 November 2019
We experimentally investigate the generating results of space-time focusing waves based on two new wave spectra, i.e., the quasi constant wave amplitude spectrum (QCWA) and the quasi constant wave steepness spectrum (QCWS), in which amplitude and steepness for each wave component can be adjusted with fixed wave energy. The wavemaker signal consists of a theoretical wavemaker motion signal and two different auxiliary functions at two ends of the signal. By testing a series of focusing waves in a physical wave tank, we found that with given wave energy, the QCWA spectrum can produce a focusing wave with larger crest elevation and farther focusing location from the wavemaker flap, as compared with the QCWS spectrum. However, both spectra lead to larger focusing wave crests when the wave frequency bandwidth was narrowed down and a positive correlation between the generated relative wave crest elevation and the input wave elevation parameter. The two spectra produce different focusing wave positions for the same wave frequency range. We also found that the focusing time strongly relates to the energy of the highest-frequency wave component of the wave spectrum.
Keywords: focusing waves; wave amplitude spectra; space-time parameter; experimental investigations focusing waves; wave amplitude spectra; space-time parameter; experimental investigations
MDPI and ACS Style

Xu, G.; Hao, H.; Ma, Q.; Gui, Q. An Experimental Study of Focusing Wave Generation with Improved Wave Amplitude Spectra. Water 2019, 11, 2521.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop