Wave power

About: Wave power is a research topic. Over the lifetime, 2671 publications have been published within this topic receiving 41439 citations. The topic is also known as: wind wave energy & sea wave energy.

Far-field theory of wave power capture by oscillating systems

Abstract: A new derivation is given of an equation, relating the capture width of a wave power converter to the polar diagram of the waves generated by the device. The pattern of waves in the lee of the device is calculated in detail.

A possible mechanism for enhanced absorption of p-modes in sunspot and plage regions

Abstract: Magnetic regions on the Sun's surface are observed to absorb large fractions of the p-mode (acoustic) wave power incident upon them. We propose a mechanism to explain the absorption, based on the idea that sunspots are assembled from many individual flux tubes with highly variant physical conditions. Strong gradients in the (perturbed) parameters of a wave propagating through such an inhomogeneous medium result in enhanced absorption of the wave power. The gradients in the wave parameters occur on the scale of the background flux tubes which is smaller than the wavelength

Spatio-Temporal Assessment of Climate Change Impact on Wave Energy Resources Using Various Time Dependent Criteria

Abstract: The wave energy resources in the Indian Ocean can be considered as a potential alternative to fossil fuels. However, the wave energy resources are subject to short-term fluctuations and long-term changes due to climate change. Hence, considering sustainable development goals, it is necessary to assess both short-term (intra-annual) variation and long-term change. For this purpose, the simulated wave characteristics were utilized, and the wave power and its variation and change were analyzed in the whole domain and nearshore areas. The short-term fluctuation was investigated in terms of monthly and seasonal variations and the future change was discussed based on absolute and relative changes. Both analyses show that the Southern Indian Ocean, despite experiencing extreme events and having higher wave energy potential, is more stable in terms of both short and long-term variation and change. The assessment of the total and exploitable storages of wave energy and their future change revealed the higher potential and higher stability of the nearshores of the Southern Indian Ocean. It can be concluded that based on various factors, the south of Sri Lanka, Horn of Africa, southeast Africa, south of Madagascar and Reunion and Mauritius islands are the most suitable areas for wave energy extraction.

Statistical properties of wave force

Abstract: Expressions of the mean and standard deviation of wave force on vertical cylinder in a random field are derived. Wave force is evaluated according to Morison's formula and the sea surface is assumed to be Gaussian. The effects of free surface fluctuation, which have previously been overlooked, are included. The mean and standard deviation are computed and results are presented graphically. It is shown that the mean of wave force is nonzero, contrary to past results. Also, the standard deviation of wave force deviates drastically from that when the free surface fluctuation phenomenon is ignored especially in the vicinity of the mean water level. Since most of the water movements are around and above the mean water level where the foregoing observed discrepancy is most pronounced, it is concluded that the effects of the free surface fluctuation phenomenon on wave force has important implications on the design considerations of marine structures that protrude above the mean water level.