Eddy
Eddy
Eddy (pronounced: /ˈɛdi/) is a term used in medicine and physics to describe a fluid flow phenomenon where the fluid constantly changes direction in a circular motion, creating a whirlpool effect. This term is often used in medical imaging, particularly in magnetic resonance imaging (MRI) and ultrasound.
Etymology
The term "eddy" originates from the Old English word "edwielle" which means whirlpool. It was first used in the medical context in the late 20th century with the advent of advanced imaging techniques.
Related Terms
- Eddy current: An electric current induced within conductors by a changing magnetic field in the conductor due to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field.
- Eddy current loss: The loss in power associated with the resistance to eddy currents in a magnetic material.
- Eddy current brake: A device used to slow or stop a moving object by producing an eddy current which opposes the change in the magnetic field.
- Eddy current separator: A device used to separate non-ferrous metals from waste materials.
- Eddy current testing: A non-destructive testing technique used in many industries to detect surface and sub-surface flaws in conductive materials.
- Eddy viscosity: A property of a fluid which represents the turbulent transfer of momentum.
See Also
External links
- Medical encyclopedia article on Eddy
- Wikipedia's article - Eddy
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