definition of turbulence
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AviationKnowledge Turbulence can be defined as small-scale, short-term, random and frequent changes to the velocity of air. In other words, when there are rapid changes to either the air’s speed or its direction of movement or both, conditions are said to be turbulent. (Wagtendonk, 2003) When an aircraft flys through this disturbed air, it will experience turbulence.
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Eddy (fluid dynamics) 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. 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 naturally observed behind la
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- Synonyms for Turbulence: excitement (noun) agitation, animation, anxiety, ardency, arousal, attentiveness, disquietude, effervescence,
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Airplane Turbulence: Is It Dangerous? While wind shears in the upper atmosphere are usually vertical, they tend to be horizontal closer to the runway. Horizontal wind shears can create eddies or swirls, of air that cause turbulence. A microburst is a type of wind shear associated with a thunderstorm and caused by a current of sinking air.
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government upheaval - a state of violent disturbance and disorder (as in politics or social conditions generally); the industrial revolution was a period of great turbulence. Sturm und Drang, turbulence. political science, politics, government - the study of government of states and other political units.
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Which airline has the less turbulence in their flights !!!? Turbulence can occur in the lowest part of the troposphere during the daytime when heating of the sun causes convective mixing of the air. Once the airplane rises above this turbulent boundary layer, the air becomes smoother. But other processes can also cause these up- and down-drafts.
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definitions - turbulencereport a problem In Poiseuille flow, for example, turbulence can first be sustained if the Reynolds number is larger than a critical value of about 2040; moreover, the turbulence is generally interspersed with laminar flow until a larger Reynolds number of about 4000.
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Publications When a turbine-type mixer creates turbulence in the lower viscosity ranges (less than 5,000 centipoise), the resulting flow is chaotic. The face of the rotating blade generates significant motion, both axially and radially, typically to distances of two to 10 blade diameters.
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- wind noun (CURRENT OF AIR) A1 [ C or U ] a current of air moving approximately horizontally, especially one strong enough to be felt: There isn't enough wind to fly a kite. The forecast warned of winds of up to 60 miles an hour today.
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- Roiling definition, to render (water, wine, etc.) turbid by stirring up sediment. See more.
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agitation unrest-a feeling of restless agitation. fidget, fidgetiness, restlessness-a feeling of agitation expressed in continual motion; he's got the fidgets; waiting gave him a feeling of restlessness. stewing-an extreme state of worry and agitation; his stewing over the fight kept him awake most of the night.
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- LINK / CITE ADD TO WORD LIST. noun. The definition of a maelstrom is a violent, turbulent situation, or a very powerful whirlpool. An example of a maelstrom was the uprising in Egypt against the former leader, Hosni Mubarak.
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dynamics dynamics - the branch of mechanics concerned with the forces that cause motions of bodies. kinetics. mechanics - the branch of physics concerned with the motion of bodies in a frame of reference. ballistics - the science of flight dynamics. Translations.
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chaotic (kā′ŏs′) n. 1. A condition or place of great disorder or confusion. 2. A disorderly mass; a jumble: The desk was a chaos of papers and unopened letters. 3. often Chaos The disordered state of unformed matter and infinite space supposed in some cosmogonic views to have existed before the ordered universe. 4. Chaos theory.
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- 2. Generally, turbulence is quite harmless. Turbulence is essentially just a rough patch caused by wind, due to thunderstorms, the jet stream, proximity to mountains, and other factors, and thus is quite common on any flight.
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stormy 1. stormy - (especially of weather) affected or characterized by storms or commotion; a stormy day; wide and stormy seas. inclement - (of weather or climate) severe. unpeaceful-not peaceful; unpeaceful times; an unpeaceful marriage. calm - (of weather) free from storm or wind; calm seas.
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- The quantity C 2$v determines the strength of the turbulence. It is called the structureconstant for the velocity & v. In a way, Eq. (2.15) is a mathematically more elegant way ofexpressing what we already derived for the velocities v(l) belonging to scale l in Section2.2, namely that v ∝ l 1/3.
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pyloric valve mitral valve the cardiac valve between the left atrium and left ventricle, usually having two cusps (anterior and posterior). Called also bicuspid valve. Valves of the heart. The right heart pumps the venous blood into the lungs. The oxygenated blood returns from the lungs into the left atrium and is propelled by the left ventricle into the aorta. The insets show closed valves: the tricuspid valve has three leaflets, whereas the mitral valve has two leaflets.
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unrest Definition of unrest for English Language Learners. : a situation in which many of the people in a country are angry and hold protests or act violently.
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- Turbulence synonyms and Turbulence antonyms. Top synonym for turbulence (another word for turbulence) is commotion.
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chaos chaos-the formless and disordered state of matter before the creation of the cosmos. physical phenomenon-a natural phenomenon involving the physical properties of matter and energy.
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Clear-air turbulence Clear-air turbulence. For other uses, see Clear air turbulence (disambiguation). Clear-air turbulence (CAT) is the turbulent movement of air masses in the absence of any visual clues such as clouds, and is caused when bodies of air moving at widely different speeds meet. The atmospheric region most susceptible to CAT is the high troposphere at altitudes of around 7,000–12,000 metres (23,000–39,000 ft) as it meets the tropopause.
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Laminar flow Laminar flow tends to occur at lower velocities, below a threshold at which it becomes turbulent. Turbulent flow is a less orderly flow regime that is characterised by eddies or small packets of fluid particles which result in lateral mixing.
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User Contributed Dictionary In fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic property changes. This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and flow velocity in space and time.n fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic property changes. This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and flow velocity in space and time.
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- Ari joins the boys, much to the chagrin of his devoted assistant, Lloyd (rex Lee) and wife, Mrs. Ari (Perrey Reeves). The Best 'Entourage' Cameos Marlow Stern July 23, 2011. Although rex Reed said once that AIDS has done more for sexual fidelity than the Bible, you know.
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- This region of the atmosphere (lowest km) where strong turbulent activity occurs is called the planetary. boundary layer (PBL). The source of the turbulence is both strong vertical wind shears and convection. We assume that turbulence mixing behaves in an analogous manner to molecular mixing. This assumption.