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In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid is in a turbulent flow regime. [2] The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object.
A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. [1] [clarification needed] Small whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be called maelstroms (/ ˈ m eɪ l s t r ɒ m,-r ə m / MAYL-strom, -strəm).
The city's zoo called for volunteers to help pack sandbags to protect animal enclosures and employees and volunteers began to move some of the 450,000 books from the city's main church archive to ...
A whirlwind A dust devil at school ground Whirlwind, 61 km northeast of Broome, Western Australia. A whirlwind is a phenomenon in which a vortex of wind (a vertically oriented rotating column of air) forms due to instabilities and turbulence created by heating and flow gradients.
Plunge pools are often very deep, generally related to the height of the fall, the volume of water, the resistance of the rock below the pool and other factors. [4] The impacting and swirling water, sometimes carrying rocks within it, abrades the riverbed into a basin, which often features rough and irregular sides. Plunge pools can remain long ...
Astronomers used the Hubble Space Telescope to make a landmark discovery of water vapor in the atmosphere of a planet just twice Earth’s diameter in size.
It is created by the erosional forces of turbulence generated by water falling on rocks at a waterfall's base where the water impacts. [2] Potholes are also sometimes referred to as swirlholes . This word was created to avoid confusion with an English term for a vertical or steeply inclined karstic shaft in limestone .
It is the widest waterfall in Europe at 249 metres (817 ft) across, and becomes as wide as 275 metres (902 ft) during spring floods. The height of the falls varies from 1.80 to 2.20 metres (5 ft 11 in to 7 ft 3 in) depending on the level of water in the river.