Focusing ocean waves for power and mondo surf

Oct 12, 2005

A new water lens may allow engineers to focus ocean waves. Focusing water waves could potentially enhance the output of wave-powered energy generation schemes, protect ocean front real estate from wave damage, and even amplify waves for surfing and other seaside recreation activities.

Researchers from the Hong Kong University of Science and Technology showed that it would be possible to make a lens from an array of vertical cylinders secured below the water, which focus small ocean waves into larger ones.

The researchers reached their conclusions by simulating the propagation of water waves through an array of ocean bottom-mounted cylinders. By varying the size and spacing of the cylinders, they showed that they could control the reflection, transmission and direction of the water waves through the array, in much the same way that mirrors and glass lenses control light.

Xinhua Hu and C. T. Chan
Physical Review Letters 95, 154501 (2005)
link.aps.org/abstract/PRL/v95/e154501

Source: American Physical Society

Explore further: Hide and seek: Sterile neutrinos remain elusive

add to favorites email to friend print save as pdf

Related Stories

Fishermen clean ocean of lost crabbing gear

Sep 25, 2014

California's rugged North Coast lays claim to one of the state's most valuable commercial fisheries: Dungeness crab. Millions of pounds of this meaty delicacy are pulled in each year from Morro Bay to the ...

The Fickle El Nino of 2014

Sep 24, 2014

Prospects have been fading for an El Niño event in 2014, but now there's a glimmer of hope for a very modest comeback. Scientists warn that unless these developing weak-to-modest El Niño conditions strengthen, ...

California's sea otter numbers holding steady

Sep 23, 2014

When a sea otter wants to rest, it wraps a piece of kelp around its body to hold itself steady among the rolling waves. Likewise, California's sea otter numbers are holding steady despite many forces pushing ...

Cape Cod saltmarsh recovery looks good, falls short

Sep 17, 2014

After decades of decline, grasses have returned to some once-denuded patches of Cape Cod's saltmarshes. To the eye, the marsh in those places seems healthy again, but a new study makes clear that a key service ...

Recommended for you

Hide and seek: Sterile neutrinos remain elusive

17 hours ago

The Daya Bay Collaboration, an international group of scientists studying the subtle transformations of subatomic particles called neutrinos, is publishing its first results on the search for a so-called ...

Novel approach to magnetic measurements atom-by-atom

21 hours ago

Having the possibility to measure magnetic properties of materials at atomic precision is one of the important goals of today's experimental physics. Such measurement technique would give engineers and physicists an ultimate ...

Scientists demonstrate Stokes drift principle

Oct 01, 2014

In nature, waves – such as those in the ocean – begin as local oscillations in the water that spread out, ripple fashion, from their point of origin. But fans of Star Trek will recall a different sort of wave pattern: ...

User comments : 0