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Fluidized bed combustion
Fluidized bed combustion is a method of burning solid fuel particles suspended in upward-flowing air at 840–950 °C, tolerating low-grade fuels and capturing sulfur with limestone.
Fluidized bed gasifier
A fluidized bed gasifier is a reactor that converts solid fuel, most often biomass, into combustible gas by suspending it in an upward flow of air, steam, or oxygen.
Fluidized bed reactor
A fluidized bed reactor is a vessel in which upward-flowing gas or liquid suspends solid particles so the mixture behaves like a boiling liquid during chemical reaction.
Fluidra
Fluidra is a Spanish multinational maker of swimming pool and wellness equipment, founded in 1969 and headquartered in Sabadell, Barcelona, with brands including AstralPool, Zodiac, and Jandy.
Fluidstack
Fluidstack is an AI data-center company, founded in 2017 as an Oxford University spin-out, that builds and operates computing clusters without owning the chips inside them.
Fluor Corporation
Fluor Corporation is an American multinational engineering, procurement, and construction company headquartered in Irving, Texas, founded in 1912 in Santa Ana, California, to build large industrial, energy, and government projects.
Fluorescent ink
Fluorescent ink is a security printing ink, invisible in normal light, that glows under ultraviolet radiation; it is used on banknotes, stamps, and identity documents.
Fluorescent-lamp formats
Fluorescent-lamp formats are the standardized shapes of fluorescent lamps, mostly straight tubes whose T number gives the tube diameter in eighths of an inch, plus compact fluorescent lamps.
Fluoride glass
Fluoride glass is an amorphous optical material in which fluorine replaces oxygen as the network former; first made accidentally in 1974, its ZBLAN form hosts mid-infrared fiber lasers.
Fluoride toxicity
Fluoride toxicity, also known as fluoride poisoning, is the harm caused by excessive fluoride, chiefly from drinking water, leading to dental fluorosis, skeletal disease, and reduced childhood IQ.
Fluoride volatility process
The fluoride volatility process is a dry, non-aqueous pyrochemical method for reprocessing spent nuclear fuel, developed from the 1950s, in which uranium and some plutonium leave as volatile hexafluorides while fission products stay solid.
Fluoride-ion battery
A fluoride-ion battery (FIB) is a rechargeable battery in which fluoride anions, rather than metal cations, carry charge, first made rechargeable at Karlsruhe in 2011.
Fluorinated ether electrolyte
A fluorinated ether electrolyte is a battery electrolyte in which ether solvents carry carbon-bound fluorine, weakening lithium coordination and raising oxidation stability for lithium-metal, sodium-ion, and high-voltage cells.
Fluorinated ethylene propylene
Fluorinated ethylene propylene (FEP) is a melt-processable copolymer of tetrafluoroethylene and hexafluoropropylene, introduced in 1960 as a thermoplastic alternative to PTFE and used for wire insulation, tubing, and labware.
Fluorinated silicate glass
Fluorinated silicate glass (FSG), or fluorosilicate glass, is silicon dioxide doped with fluorine to lower its dielectric constant, used as an intermetal dielectric in semiconductor manufacturing.
Fluorine-free electrolyte
A fluorine-free electrolyte is a battery electrolyte in which no component contains fluorine, investigated to replace commercial LiPF6-based electrolytes over safety, environmental, and regulatory concerns.
Fluorite structure
The fluorite structure is a cubic crystal structure named after the mineral fluorite (CaF₂), where cations form a face-centered cubic lattice and anions fill tetrahedral sites.
Flush toilet
A flush toilet, or water closet, is a sanitation fixture that removes waste from a bowl by flushing it with water through a water-sealed trap into a drain.
Flushing–Main Street station (IRT Flushing Line)
Flushing–Main Street is the eastern terminus of the 7 train in downtown Flushing, Queens, opened in 1928 and among the busiest New York City Subway stations outside Manhattan.
Fluting (firearms)
Fluting in firearms is the machining of longitudinal or spiral grooves into the exterior of a rifle barrel, most commonly to reduce its weight without shortening it, in straight, spiral, or custom styles.
Flutter (software)
Flutter, also known as Google Flutter, is an open source cross-platform user interface toolkit written in Dart that builds iOS, Android, web, and desktop apps from a single codebase.
Flutter analysis
Flutter analysis is the aeroelastic method predicting self-excited oscillations of wings and structures from aerodynamic, elastic, and inertial forces, giving the critical speed for aircraft certification.
Flutter Entertainment
Flutter Entertainment, also known as Paddy Power and Betfair, is a global online sports betting and iGaming company. Formed in 2016, it operates diverse brands and trades on the NYSE.
Fluvius
Fluvius, the operating name of Fluvius System Operator cvba, is the Belgian multi-utility network company that manages electricity, gas, and heat distribution in all 300 Flemish municipalities.
FLUX (AI model)
FLUX is a family of text-to-image and image-editing models built on flow matching by Black Forest Labs, first introduced in August 2024 with the FLUX.1 release.
Flux (metallurgy)
Flux, in metallurgy, is a material such as limestone or silica added to a furnace, crucible, or weld pool to combine with impurities and form a removable slag.
Flux (text-to-image model)
Flux is a family of text-to-image models developed by Black Forest Labs, a company founded by former Stability AI researchers, first released on August 1, 2024.
Flux-cored arc welding
Flux-cored arc welding (FCAW) is a semiautomatic arc welding process that joins metals with a continuously fed tubular flux-cored wire, widely used in structural fabrication, construction, and shipbuilding.
FLUX.1
FLUX.1 is a family of 12-billion-parameter text-to-image models released by Black Forest Labs in 2024, with Pro available by API, Dev open-weight for non-commercial use, and Schnell under Apache 2.0.
FLUX.2
FLUX.2 is a text-to-image generation and editing model family released by Black Forest Labs in November 2025, with an open-weight 32 billion parameter [dev] checkpoint.