HELICITY
A property of a moving fluid, such as air, representing the potential for helical flow (flow that follows a corkscrew pattern). Computed from the vertical wind profile of the lower atmosphere and measured relative to the motion as a storm, it is used to forecast the formation of mesocyclones. | ||||
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Helicity definition was found in categories: Science & Technology(2) Encyclopedia(1)
Helicity Definition from Science & Technology Dictionaries & Glossaries
| A COMPREHENSIVE GLOSSARY OF WEATHER |
Helicity
A property of a moving fluid which represents the potential for helical flow (i.e. flow which follows the pattern of a corkscrew) to evolve. Helicity is proportional to the strength of the flow, the amount of vertical wind shear , and the amount of turning in the flow (i.e. vorticity ). Atmospheric helicity is computed from the vertical wind profile in the lower part of the atmosphere (usually from the surface up to 3 km), and is measured relative to storm motion. Higher values of helicity (generally, around 150 m2/s2 or more) favor the development of mid-level rotation (i.e. mesocyclones ). Extreme values can exceed 600 m2/s2.
A property of a moving fluid which represents the potential for helical flow (i.e. flow which follows the pattern of a corkscrew) to evolve. Helicity is proportional to the strength of the flow, the amount of vertical wind shear , and the amount of turning in the flow (i.e. vorticity ). Atmospheric helicity is computed from the vertical wind profile in the lower part of the atmosphere (usually from the surface up to 3 km), and is measured relative to storm motion. Higher values of helicity (generally, around 150 m2/s2 or more) favor the development of mid-level rotation (i.e. mesocyclones ). Extreme values can exceed 600 m2/s2.
| Solar Energy |
Helicity
The helicity of an object is the measure of "twist" it has, such as the degree of coiling of a magnetic field. A more mathematical description of helicity.
The helicity of an object is the measure of "twist" it has, such as the degree of coiling of a magnetic field. A more mathematical description of helicity.
Helicity Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Helicity
The term helicity has several meanings in physics, all referring (perhaps obliquely) to a phenomenon that resembles a helix. See:
In biochemistry, helicity may also refer to the amount of alpha helix represented in the secondary structure of a protein.
In chemistry, helicity may refer to a type of planar chirality.
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