vorticity region
21Airfoil — An airfoil (in American English) or aerofoil (in British English) is the shape of a wing or blade (of a propeller, rotor or turbine) or sail as seen in cross section. An airfoil shaped body moved through a fluid produces a force perpendicular to… …
22Breaking wave — In physics, a breaking wave is a wave whose amplitude reaches a critical level at which some process can suddenly start to occur that causes large amounts of wave energy to be dissipated. At this point, simple physical models describing the… …
23Tornadogenesis — A sequence of images showing the birth of a supercellular tornado. First, the rotating cloud base lowers. This lowering becomes a funnel, which continues descending while winds build near the surface, kicking up dust and other debris. Finally,… …
24Flow velocity — In fluid dynamics the flow velocity, or velocity field, of a fluid is a vector field which is used to mathematically describe the motion of a fluid.DefinitionThe flow velocity of a fluid is a vector field: mathbf{u}=mathbf{u}(mathbf{x},t)which… …
25Helicidad (mecánica de fluidos) — Para otros usos de este término, véase helicidad. En mecánica de fluidos, la helicidad es una magnitud física asociada al flujo que mide en cada punto del mismo la proyección de la vorticidad sobre la velocidad, dado que la combinación de un giro …
26Tropopause — The tropopause is in the atmosphere between the troposphere and the stratosphere. Here the air ceases to cool at 56.5°C ( 70°F), and the air becomes almost completely dry.The troposphere is the lowest of the Earth s atmospheric layers and is the… …
27Convective available potential energy — A skew T plot showing a morning sounding with a large hydrolapse followed by an afternoon sounding showing the cooling which occurred in the mid levels resulting in an unstable atmosphere as surface parcels have now become negatively buoyant. The …
28Atmosphere of Jupiter — Cloud pattern on Jupiter in 2000 The atmosphere of Jupiter is the largest planetary atmosphere in the Solar System. It is mostly made of molecular hydrogen and helium in roughly solar proportions; other chemical compounds are present only in… …
29Superfluid — Superfluidity is a phase of matter or description of heat capacity in which unusual effects are observed when liquids, typically of helium 4 or helium 3, overcome friction by surface interaction when at a stage, known as the lambda point for… …
30Lake-effect snow — Lake Effect redirects here. For the American literary journal, see Lake Effect (journal). Lake effect precipitation coming off Lake Erie and into Western New York, as seen by NEXRAD radar, October 12–13, 2006 …
