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What is "eddy"

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eddy
Longman Dictionary of Contemporary English
eddy
I.noun
COLLOCATIONS FROM CORPUS
■ ADJECTIVE
large
▪ Some general comments about the large eddies are needed before we consider a wake specifically.
▪ Such a marked contrast between the curves seems unlikely to arise unless there are coherent features in the large eddy motion.
▪ The large eddies are the longest-lived features of a turbulent flow.
▪ There is then little direct interaction between the large eddies governing the energy transfer and the small dissipating eddies.
small
▪ There is thus an intensification of the motion on a smaller scale; that is a transfer of energy to smaller eddies.
▪ Hence the viscous dissipation is associated with high wavenumbers; i.e. it is brought about by small eddies.
▪ The small dissipative eddies must be generated from larger ones.
▪ Beyond it flowed the heavy mainstream, with small eddies curling along and through the wire on the surface.
▪ There is then little direct interaction between the large eddies governing the energy transfer and the small dissipating eddies.
EXAMPLES FROM CORPUS
▪ Also, these eddies are particularly apparent in experiments with dyed wakes.
▪ But he attempts to capture the flow of the music in constant eddies of movement.
▪ Sabour was an eddy of life in the midst of a sea of lethargy.
▪ Small eddies in the flow entrain cold water, mixing it into the plume, cooling the plume quickly.
▪ Some general comments about the large eddies are needed before we consider a wake specifically.
▪ The details of the evening, the chronology of conversation came in successive eddies of reflected delight and despair.
▪ The figure shows schematically the pattern of motion produced by several such eddies.
▪ We got too deep into the whitewater, skimmed a hidden back eddy, and were spun around 180 degrees.
II.verb
EXAMPLES FROM CORPUS
▪ As the water rose it eddied into whirlpools that threatened to sweep her away.
▪ At the hall cupboard she stopped, taking a deep steadying breath to calm the currents suddenly eddying through her body.
▪ Powerful emotion eddied around us: grief, sadness, fear.
▪ The current eddied among and between the shops and the bank and the Hotel Rehoboth as black and thick as oil.
▪ The life of the airport eddied round her.
The Collaborative International Dictionary
Eddy

Eddy \Ed"dy\ ([e^]d"d[y^]), n.; pl. Eddies ([e^]d"d[i^]z). [Prob. fr. Icel. i[eth]a; cf. Icel. pref. i[eth]- back, AS. ed-, OS. idug-, OHG. ita-; Goth. id-.]

  1. A current of air or water running back, or in a direction contrary to the main current.

  2. A current of water or air moving in a circular direction; a whirlpool.

    And smiling eddies dimpled on the main.
    --Dryden.

    Wheel through the air, in circling eddies play.
    --Addison.

    Note: Used also adjectively; as, eddy winds.
    --Dryden.

Eddy

Eddy \Ed"dy\, v. i. [imp. & p. p. Eddied; p. pr. & vb. n. Eddying.] To move as an eddy, or as in an eddy; to move in a circle.

Eddying round and round they sink.
--Wordsworth.

Eddy

Eddy \Ed"dy\, v. t. To collect as into an eddy. [R.]

The circling mountains eddy in From the bare wild the dissipated storm.
--Thomson.

Related phrases:
Douglas Harper's Etymology Dictionary
eddy

mid-15c., Scottish ydy, possibly related to Old Norse iða "whirlpool," from Proto-Germanic *ith- "a second time, again," which is related to the common Old English prefix ed- "again, backwards; repetition, turning" (forming such words as edðingung "reconciliation," edgift "restitution," edniwian "to renew, restore," edhwierfan "to retrace one's steps," edgeong "to become young again"). Compare Old English edwielle "eddy, vortex, whirlpool." The prefix is from PIE root *eti "above, beyond" (Cognates: Latin et, Old High German et-, Gothic iþ "and, but, however"). Related: Eddies.

eddy

1730 (transitive); 1810 (intrans.), from eddy (n.). Related: Eddied; eddying.

Wiktionary
eddy

n. 1 A current of air or water running back, or in an opposite direction to the main current. 2 A circular current; a whirlpool. vb. (context intransitive English) To form an eddy; to move in, or as if in, an eddy; to move in a circle.

Related phrases:
Gazetteer
Eddy -- U.S. County in North Dakota
Population (2000): 2757
Housing Units (2000): 1418
Land area (2000): 630.118543 sq. miles (1631.999466 sq. km)
Water area (2000): 14.109773 sq. miles (36.544144 sq. km)
Total area (2000): 644.228316 sq. miles (1668.543610 sq. km)
Located within: North Dakota (ND), FIPS 38
Location: 47.747572 N, 98.975712 W
Headwords:
Eddy
Eddy, ND
Eddy County
Eddy County, ND
Eddy -- U.S. County in New Mexico
Population (2000): 51658
Housing Units (2000): 22249
Land area (2000): 4182.021664 sq. miles (10831.385925 sq. km)
Water area (2000): 15.552658 sq. miles (40.281198 sq. km)
Total area (2000): 4197.574322 sq. miles (10871.667123 sq. km)
Located within: New Mexico (NM), FIPS 35
Location: 32.527170 N, 104.262035 W
Headwords:
Eddy
Eddy, NM
Eddy County
Eddy County, NM
Wikipedia
Eddy (surname)

The surname Eddy is used by descendants of a number of English, Irish and Scottish families.

Eddy (film)

Eddy is a 2015 Italian film written, directed, and scored by Simone Borrelli ,who also starred in the film.
The film is supported by The Presidency of the Council of Ministers of the Italian Republic and had an exclusive world premiere in Strasbourg on October 15, 2014, where it received the accolade of being Official Human Rights Movie 2015 from the Council of Europe
The film is about violence against children, volunteer doctors, and terrorist attacks in Syria.

Eddy (fluid dynamics)

In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid flows past an obstacle. The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object. Fluid behind the obstacle flows into the void creating a swirl of fluid on each edge of the obstacle, followed by a short reverse flow of fluid behind the obstacle flowing upstream, toward the back of the obstacle. This phenomenon is most visible behind large emergent rocks in swift-flowing rivers.

Another possible type of turbulence is the vortex. This notion is now applied to gases, which have the same properties as liquids. Here, no void is created, but only an area of lower pressure, but again, a backflow causes the gas to rotate.

Related phrases:

Usage examples of "eddy".

Some hours after midnight, the Typhoon abated so much, that through the strenuous exertions of Starbuck and Stubb-- one engaged forward and the other aft--the shivered remnants of the jib and fore and main-top-sails were cut adrift from the spars, and went eddying away to leeward, like the feathers of an albatross, which sometimes are cast to the winds when that storm-tossed bird is on the wing.

The breeze upset them, the eddies near the ground upset them, a passing thought in the mind of the aeronaut upset them.

And here at the Cytaean mainland and from the Amarantine mountains far away and the Circaean plain, eddying Phasis rolls his broad stream to the sea.

On either side, to right and left the tree-girdle reached out toward the blue distance, thick close and unsundered, save where it and the plain which it begirdled was cleft amidmost by a river about as wide as the Thames at Sheene when the flood-tide is at its highest, but so swift and full of eddies, that it gave token of mountains not so far distant, though they were hidden.

They sagged and bowed, water breaching them in gouts and diluting the riverbed, eddying around the feet of the few remaining strikers, coiling like the gas above it, until with a shiver the Gross Tar reknit itself, healing the little rift that had paralysed it and confused its currents.

The little vessel continued to beat its way seaward, and the ironclads receded slowly towards the coast, which was hidden still by a marbled bank of vapour, part steam, part black gas, eddying and combining in the strangest way.

Froth curled around the cutwater, drawing eddies in the patch of surface Ilna could see through the scuttle.

In a quick look round the stage while Conrad Bone was announcing the next number, Astor noticed that Dexie Jordan had taken over from Eddy Edwards on bass guitar.

Here, back eddies had formed a swamp, and as she approached this protected area diplodocus became aware of a sense of security.

People flow between its banks, eddying at the doors of office towers and department stores.

Eddy, was well adapted for its purpose, and read by a professional elocutionist, not an adherent of the order, Mrs.

From the avenue of lime-trees showers of round, yellow leaves were flying through the air in tossing, eddying circles, and strewing the wet road and soaked aftermath of the hayfield with a clammy carpet.

Dry leaves eddied along the floors, whispering, blown by a bitterly cold breeze from the gargoyle-wreathed balcony overlooking Isse Harbor.

In the distance he could see other Qanska settling down to sleep: Protectors and their Nurturer mates, floating and twisting together in the eddy currents.

Had Eddy Gagan, our glorious full forward, looked a bit peeky on his last outing?