In fluid dynamics, wind waves or, more precisely, wind-generated waves are surface waves that occur on the free surface of oceans, seas, lakes, rivers, and canals or even on small puddles and ponds. They usually result from the wind blowing over a vast enough stretch of fluid surface. Waves in the oceans can travel thousands of miles before reaching land. Wind waves range in size from small ripples to huge waves over 30 m high.
When directly being generated and affected by the local winds, a wind wave system is called a wind sea. After the wind ceases to blow, wind waves are called swell. Or, more generally, a swell consists of wind generated waves that are not—or are hardly—affected by the local wind at that time. They have been generated elsewhere, or some time ago. Wind waves in the ocean are called ocean surface waves.
Wind waves have a certain amount of randomness: subsequent waves differ in height, duration and shape, with a limited predictability. They can be described as a stochastic process, in combination with the physics governing their generation, growth, propagation and decay—as well as governing the interdependence between flow quantities such as: the water surface movements, flow velocities and water pressure. The key statistics of wind waves (both seas and swells) in evolving sea states can be predicted with wind wave models.
Tsunamis are a specific type of wave not caused by wind but by geological effects. In deep water, tsunamis are not visible because they are small in height and very long in wavelength. They may grow to devastating proportions at the coast due to reduced water depth.
Other articles related to "waves, wave, water waves, water":
... This is a list of waves named after people (eponymous waves) ... Wave Field Person(s) Named After Alfvén wave Magnetohydrodynamics Hannes Alfvén Bloch wave Solid state physics, condensed matter physics Felix ...
... Main article Water waves Ripples on the surface of a pond are actually a combination of transverse and longitudinal waves therefore, the points on the ... Sound—a mechanical wave that propagates through gases, liquids, solids and plasmas Inertial waves, which occur in rotating fluids and are restored by the Coriolis effect Ocean ...
... Further information Dispersion (water waves) and Airy wave theory The dispersion relation for deep water waves is often written as where g is the acceleration due to gravity ... Deep water, in this respect, is commonly denoted as the case where the water depth is larger than half the wavelength ...
... Airy wave theory Boussinesq approximation (water waves) Clapotis Luke's variational principle Mild-slope equation Rogue wave Shallow water equations ...
... deformations Seiberg–Witten 1+3 Seiberg–Witten invariants, QFT Shallow water 1+2 shallow water waves Sine–Gordon 1+1 Solitons, QFT Sinh–Gordon ...
Famous quotes containing the words waves and/or water:
“His bold head
Bove the contentious waves he kept, and oared
Himself with his good arms in lusty stroke
To the shore.”
—William Shakespeare (15641616)
“Beauclerc: Youve got a good memory for one who drinks.
Eddie: Drinkin dont bother my memory. If it did, I wouldnt drink. I couldnt. You see, Id forget how good it was. Then whered I be? Id start drinkin water again.”
—Jules Furthman (18881960)