Flux Flux describes any effect that appears to pass or travel (whether it actually moves or not) through a surface or substance. Flux is a concept in applied mathematics and vector calculus which has many applications in physics. For transport phe ...

is a rate of flow through a surface or substance in physics, and has a related meaning in applied mathematics. Flux may also refer to:

Science and technology

Biology and healthcare

* Flux (biology), movement of a substance between compartments *

Flux (metabolism) In biochemistry, metabolic flux (often referred to as flux) is the rate of turnover of molecules through a metabolic pathway. Flux is regulated by the enzymes involved in a pathway. Within cells, regulation of flux is vital for all metabolic pa ...

, the rate of turnover of molecules through a metabolic pathway *

4-Fluoroamphetamine 4-Fluoroamphetamine (4-FA; 4-FMP; PAL-303; "Flux"), also known as ''para''-fluoroamphetamine (PFA) is a psychoactive drug, psychoactive research chemical of the phenethylamine and substituted amphetamine chemical classes. It produces stimulant a ...

(4-FA; PAL-303; "Flux"), a central nervous system stimulant with quasi-amphetamine effects *

Dysentery Dysentery ( , ), historically known as the bloody flux, is a type of gastroenteritis that results in bloody diarrhea. Other symptoms may include fever, abdominal pain, and a feeling of incomplete defecation. Complications may include dehyd ...

, or other diseases called "flux", which cause the loss of fluid by diarrhea or hemorrhage *

Rheumatism Rheumatism or rheumatic disorders are conditions causing chronic, often intermittent pain affecting the joints or connective tissue. Rheumatism does not designate any specific disorder, but covers at least 200 different conditions, including a ...

(historically), or "flux", thought to be caused by an excessive flow of ''rheum'' or fluid into a joint * Slime flux, a bacterial disease that occurs on certain trees

Computing

* Flux (machine-learning framework) * Flux (graphics software), a suite of VRML/X3D viewing/authoring software * Flux (software company), a developer of workflow software * Flux (text-to-image model), a suite of text-to-image model developed by Black Forest Labs * f.lux, a program that adjusts the color temperature of a computer display * Fast flux, a DNS technique used by botnets to hide phishing and malware delivery sites

Physics and engineering

Materials

Flux (metallurgy) In metallurgy, a flux is a chemical reducing agent, flowing agent, or purifying agent. Fluxes may have more than one function at a time. They are used in both extractive metallurgy and metal joining. Some of the earliest known fluxes were ...

, a chemical reducing agent, flowing agent, or purifying agent enhancing success in soldering and like joining of metals *

Ceramic flux Fluxes are substances, usually oxides, used in glasses, glazes and ceramic bodies to lower the high melting point of the main glass forming constituents, usually silica and alumina. A ceramic flux functions by promoting partial or complete liqu ...

, a substance which lowers the melting point and promotes glass formation in ceramic materials and glasses ** Secondary flux, a substance which acts as a ceramic flux in combination with other materials or at higher temperatures

Something integrated over a surface

Electric flux In electromagnetism, electric flux is the total electric field that crosses a given surface. The electric flux through a closed surface is directly proportional to the total charge contained within that surface. The electric field E can exert ...

, the electric field through a surface integrated over the surface's area *

Luminous flux In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of electromagnetic radiation (including infrared, ultraviolet, and visible light), in that ...

, luminous intensity integrated over solid angle. Used in photometry *

Magnetic flux In physics, specifically electromagnetism, the magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface. It is usually denoted or . The SI unit of magnetic flux is the we ...

, magnetic field through a surface integrated over the surface's area *

Radiant flux In radiometry, radiant flux or radiant power is the radiant energy emitted, reflected, transmitted, or received per unit time, and spectral flux or spectral power is the radiant flux per unit frequency or wavelength, depending on whether the ...

, the total power emitted by a source. Used in radiometry

Something per unit area

Intensity (physics) In physics and many other areas of science and engineering the intensity or flux of radiant energy is the Power (physics), power transferred per unit area, where the area is measured on the plane perpendicular to the direction of propagation of th ...

, power per unit area (sometimes also called ''flux'')

People with the name

* Alfred William Flux (1867–1942), British economist and statistician * Robert Flux, guitarist of the band

Oomph! Oomph! is a German Rock music, rock band from Wolfsburg, formed in 1989. The band pioneered the movement. Their work contains lyrics in both English and German, with a shift towards German exclusively on recent albums (''GlaubeLiebeTod'', '' ...

* Maarten van der Vleuten (born 1967), Dutch composer and producer, alias Flux

Art and entertainment

Fictional characters

* Flux (comics), a Marvel Comics antagonist opposing the Hulk * Flux (Dennis Sykes), a character in the Marvel Comics series ''1 Month 2 Live'' * Flux Wildly, a character in the computer game '' Toonstruck''

Literature

* ''Flux'' (novel), a book by Stephen Baxter * "Flux", a short story by

Michael Moorcock Michael John Moorcock (born 18 December 1939) is an English writer, particularly of science fiction and fantasy, who has published a number of well-received literary novels as well as comic thrillers, graphic novels and non-fiction. He has wo ...

Music

* ''Flux'' (Caveman Shoestore album), 1994 * ''Flux'' (Alison Goldfrapp album), 2025 * ''Flux'' (Poppy album), or the title song, 2021 * ''Flux'' (Rich Robinson album), 2016 * ''Flux'', an album by Love Spirals Downwards, 1998 * "Flux" (Bloc Party song), 2007 * "Flux" (Ellie Goulding song), 2019 * "Flux", a song by Lamb of God from '' New American Gospel'', 2000

Other uses in art and entertainment

* ''Flux'' (magazine), a music, comic book and video game magazine of the 1990s *

MTV Flux MTV Flux was a television channel in the United Kingdom and Ireland. The version in the UK and Ireland launched on 6 September 2006. The brand started as a website on 1 August. It used bandwidth that was originally used to broadcast VH2. There i ...

, a former television channel in the United Kingdom and Japan * '' Doctor Who: Flux'', the thirteenth series of the British science fiction television programme

Other uses

* Flux (political party), a political party in Australia * Flux, Utah, a ghost town and former mining community in

Tooele County, Utah Tooele County ( ) is a County (United States), county in the U.S. state of Utah. As of the 2020 United States census, the population was 72,698. Its county seat and largest city is Tooele, Utah, Tooele. The county was created in 1850 and organ ...

* "Flux", the imagery of the River in the fragments of the presocratic philosopher

Heraclitus Heraclitus (; ; ) was an Ancient Greece, ancient Greek Pre-Socratic philosophy, pre-Socratic philosopher from the city of Ephesus, which was then part of the Achaemenid Empire, Persian Empire. He exerts a wide influence on Western philosophy, ...