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Flame caused by separate oxidizer and fuel
combustion, a diffusion flame is a flame in which the oxidizer and fuel are separated before burning. Contrary to its name, a diffusion flame involves both
Diffusion_flame
Visible, gaseous part of a fire
combustion to a flame. In a diffusion flame, oxygen and fuel diffuse into each other; the flame occurs where they meet. In a premixed flame, the oxygen and
Flame
In combustion, Clarke–Riley diffusion flame is a diffusion flame that develops inside a naturally convected boundary layer on a hot fuel surface with quiescent
Clarke–Riley_diffusion_flame
Flame with temperature below about 400 °C
and temporarily quenches the process. Unlike a cool premixed flame, a cool diffusion flame (CDF) burns in the presence of an equivalence ratio gradient
Cool_flame
Rapid and hot oxidation of a material
NASA reveal that diffusion flames in microgravity allow more soot to be completely oxidized after they are produced than diffusion flames on Earth, because
Fire
Flame where the fuel and oxidizer are mixed before combustion
depends on the convection-diffusion-reaction balance within the flame, i.e. on its inner chemical structure. The premixed flame is characterised as laminar
Premixed_flame
Combustion that leads on to an explosion
and other factors. Most fires found in daily life are diffusion flames. Deflagrations with flame speeds in the range of 1 m/s differ from detonations which
Deflagration
States of a flame
A flame is affected by the fuel introduced and the oxygen available. A flame with a balanced oxygen-fuel ratio is called a neutral flame. The color of
Oxidizing_and_reducing_flames
Liñán diffusion flame theory is a theory developed by Amable Liñán in 1974 to explain the diffusion flame structure using activation energy asymptotics
Liñán's diffusion flame theory
Liñán's_diffusion_flame_theory
Fluid transport regime by random walk
diffusion in flames. Main areas of study include combustion systems in gas burners used for power generation and chemical reactions in jet diffusion flames
Turbulent_diffusion
Type of ordinary differential equation
of diffusion flame, Liñán's equation is a second-order nonlinear ordinary differential equation which describes the inner structure of the diffusion flame
Liñán's_equation
Howard Wilson Emmons in 1956. The flame is of diffusion flame type because it separates fuel and oxygen by a flame sheet. The corresponding problem in
Emmons_problem
Diffusion flame
A pool fire is a type of diffusion flame where a layer of volatile liquid fuel is evaporating and burning. The fuel layer can be either on a horizontal
Pool_fire
Instrinsic flame instability
intrinsic flame instability that occurs both in premixed flames and in diffusion flames and arises because of the difference in the diffusion coefficient
Diffusive–thermal_instability
Type of flame
In combustion, a Burke–Schumann flame is a type of diffusion flame, established at the mouth of the two concentric ducts, by issuing fuel and oxidizer
Burke–Schumann_flame
for the lifted diffusion flame stabilisation and the flame anchors at a point where the flow is turbulent. Gollahalli argued that the flame will tend to
Flame_lift-off
Chemical reaction between a fuel and oxygen
may occur through one of four distinctive types of burning: diffusion flame, premixed flame, autoignitive reaction front, or as a detonation. The type
Combustion
Type of internal combustion engine
the air when ignition starts, a premixed flame occurs, which is generally much faster than the diffusion flame present in compression ignition engines
Stratified_charge_engine
1997 American crewed spaceflight
field as affected by oxidizer flow on flame stabilization, examine the state relationships of co-flow diffusion flames under the influence of buoyancy conditions
STS-87
present within the turbulent flow field. Counterflow diffusion flame is a common laminar flame which is used to represent a flamelet in a turbulent flow
Laminar_flamelet_model
Burning flame which is brightly visible
combustion, luminosity is associated with diffusion flames and is lessened with premixed flames. The flame is yellow because of its temperature. To produce
Luminous_flame
Model in combustion
pre-mixture is difficult, are called diffusion combustion or diffusion flames. Diffusion flames can be laminar diffusion flames (e.g. candles and matches burning
Eddy_break-up_model
High temperature flame from pressurised fuel
spray fire if the fuel is a liquid or liquefied gas, is a turbulent diffusion flame of flammable material. The characteristics of a jet fire depend on
Jet_fire
Disposal of unwanted gas during extraction
flare stack and combusted into Earth's atmosphere (usually in an open diffusion flame). Where performed, the unwanted gas (mostly natural gas dominated by
Routine_flaring
Form of thermal efficiency
microgravity reveal that diffusion flames in microgravity allow more soot to be completely oxidised after they are produced than diffusion flames on Earth, because
Fuel_efficiency
Non-functional combustion engine concept
solely by mixture quality Heterogeneous air-fuel mixture High air ratio Diffusion flame Fuel with high ignition performance Source: A Wankel Diesel engine
Wankel_Diesel_engine
Near-field diffraction effect
effect of magnetic field on temperature and temperature profile of diffusion flame using circular grating Talbot interferometer". Optics and Lasers in
Talbot_effect
Spanish aeronautical engineer (1934–2025)
case working directly for NASA and the European Space Agency. The diffusion flame structure in counterflow was analyzed by him in 1974 through activation-energy
Amable_Liñán
Rocket engine that uses both liquid / gaseous and solid fuel
reacted with the solid propellant. Combustion occurs in a boundary layer diffusion flame adjacent to the surface of the solid propellant. Generally, the liquid
Hybrid-propellant_rocket
proportion. This surface is special in combustion because this is where a diffusion flame resides. Constant level of this surface is identified from the equation
Mixture_fraction
Dimensionless number describing oscillating flow mechanisms
the aeronautical field. Considering pulsating methane-air coflow jet diffusion flames, we get St = a w j U j {\displaystyle {\text{St}}={\dfrac {aw_{j}}{U_{j}}}}
Strouhal_number
laws Diffusion equation Heat equation Kardar-Parisi-Zhang equation Kuramoto–Sivashinsky equation Liñán's equation as a model of diffusion flame Maxwell
List of named differential equations
List_of_named_differential_equations
Indian-American scientist and engineer
work. Puri has explained the structure and extinction of counterflow diffusion flames, use of magnetic fluids for heat transfer and drug targeting, how biological
Ishwar_Puri
Mathematical method in fluid dynamics
Liñán in 1991 for diffusion-flame problems where the chemical time scale is infinitely small (Burke–Schumann limit) so that the flame appears as a thin
Shvab–Zeldovich_formulation
Flow created by a uniformly rotating infinitely long plate disk
propagation dynamics of spiral edges of diffusion flames in von Kármán swirling flows" (PDF). Combustion and Flame. 158 (2): 255–272. Bibcode:2011CoFl..158
Von_Kármán_swirling_flow
Series of reactions for methane combustion
computation of stretched laminar methane-air diffusion flames using a reduced four-step mechanism". Combustion and Flame. 68 (1): 17–29. Bibcode:1987CoFl...68
Peters_four-step_chemistry
American mechanical engineer (1925-2013)
entitled Effect of adding a combustible to atmosphere and surrounding diffusion flame. In 1974, Graham became assistant director for Engineering and Science
Lois_Graham
Type of explosion
flame propagation) to a detonation (supersonic shock-coupled combustion). In a deflagration the flame front grows through heat transfer and diffusion
Deflagration to detonation transition
Deflagration_to_detonation_transition
Flame, 122 233-252 (2000). 1999. K H Luo, "Combustion Effects on Turbulence in a Partially Premixed Supersonic Diffusion Flame" Combustion and Flame,
Sugden_Award
Concept from evolutionary biology
hydrogen flames. Zeldovich explained the cellular structure as a consequence of hydrogen's diffusion coefficient being larger than the thermal diffusion coefficient
Turing_pattern
Type of internal combustion engine that uses compression to create combustion
leaner than the stoichiometric ratio. Diffusion flame: At combustion, oxygen first has to diffuse into the flame, rather than having oxygen and fuel already
Diesel_engine
Combustion models of fuel reactions and energy release for computational fluid dynamics
variables is predicted through experimental data obtained during laminar diffusion flame experiment and laminar flamelet relationship is deduced based on the
Combustion_models_for_CFD
research interests included Shock waves, detonations, gas dynamics and flame theory. Clarke was elected a Fellow of the Royal Society in 1982. His nomination
John_Frederick_Clarke
particles heated by a nanosecond pulsed laser in an atmospheric laminar diffusion flame". International Journal of Heat and Mass Transfer. 49 (3): 777–788
Alfred_Leipertz
Dimensionless numbers used in chemical engineering
oxide levels of turbulent jet diffusion flames: Effects of residence time and damkohler number". Combustion and Flame. 88 (1): 37–49. Bibcode:1992CoFl
Damköhler_numbers
French combustion engineer
flammes de diffusion laminaires et turbulentes [Asymptotic and numerical study of the structure of laminar and turbulent diffusion flames] supervised
Bénédicte_Cuenot
Metal oxide powder production method
Liquid–feed flame spray pyrolysis (LF-FSP) is one of the most recent iterations in flame spray pyrolysis (FSP) powder production technology. FSP produces
Liquid-feed flame spray pyrolysis
Liquid-feed_flame_spray_pyrolysis
Mass ratio of air to a fuel
"Soot inception limits in laminar diffusion flames with application to oxy-fuel combustion" (PDF). Combustion and Flame. 154 (3): 546–556. Bibcode:2008CoFl
Air–fuel_ratio
Topics referred to by the same term
Burke Burke's theorem or Burke's Output Theorem Burke–Schumann flame, a type of diffusion flame USS Burke (DE-215), a Buckley-class destroyer escort of the
Burke_(disambiguation)
Substance dissolving a solute resulting in a solution
(1 July 1985). "Concerning the Luminosity of Methanol-Hydrocarbon Diffusion Flames". Combustion Science and Technology. 43 (3–4): 115–125. doi:10.1080/00102208508947000
Solvent
Cage-like allotrope of carbon
; Vander Sande, John B. (2000). "Fullerenes and Nanostructures in Diffusion Flames" (PDF). Proceedings of the Combustion Institute. 28: 1397–1404. CiteSeerX 10
Buckminsterfullerene
dynamics, 26(2), 161-165. Dold, J. W. (1997). Triple flames as agents for restructuring of diffusion flames. Advances in combustion science: In honor of Ya
Kerr–Dold_vortex
Natural disaster in Nigeria
spread of fire within a structure often involves the occurrence of diffusion flames. Pyrolysis products are released from heated solid fuel and mix with
Natural_disasters_in_Nigeria
Type of microbiology test
The disk diffusion test (also known as the agar diffusion test, Kirby–Bauer test, disc-diffusion antibiotic susceptibility test, disc-diffusion antibiotic
Disk_diffusion_test
Problem-solving technique in applied mathematics using order-of-magnitude approximations
pressure-driven wall jet, separating flows behind backward-facing steps, jet diffusion flames, study of linear and non-linear dynamics. Scale analysis is an effective
Scale_analysis_(mathematics)
Liñán, Amable (July 1974). "The asymptotic structure of counterflow diffusion flames for large activation energies". Acta Astronautica. 1 (7–8): 1007–1039
List of nonlinear ordinary differential equations
List_of_nonlinear_ordinary_differential_equations
American professor (1912–1998)
compressor (still a major item of research today). He initiated studies on diffusion flames inside a boundary layer, and Emmons problem is named after him. He
Howard_Emmons
Bryden, K.M. (2013). "Thermo-acoustic behavior of a swirl stabilized diffusion flame with heterogeneous sensors". Applied Energy. 106: 1–16. Bibcode:2013ApEn
Ashwani_K_Gupta
American professor of engineering
experimental study of soot formation in a coflow, laminar diffusion flame". Combustion and Flame. 117 (1): 117–139. Bibcode:1999CoFl..117..117S. doi:10
Lisa_Pfefferle
asymptotics Liñán's equation Liñán's diffusion flame theory Burke, S. P.; Schumann, T. E. W. (1928). "Diffusion flames". Industrial & Engineering Chemistry
Burke–Schumann_limit
Manufacturing process of synthetic gemstones
Verneuil method (or Verneuil process or Verneuil technique), also called flame fusion, was the first commercially successful method of manufacturing synthetic
Verneuil_method
interest includes combustion (flame synthesis, laminar diffusion flame structure, micro flames, soot formation), fire research (flame spread, fire whirls, boil
Kozo_Saito
American scientist and explorer (born 1941)
4210 (1980). Laser spark ignition and extinction of a methane/air diffusion flame, R. W. Schmieder, J. Appl. Phys. 52, 3000 (1981). Combustion applications
Robert_Schmieder
Gem variety of corundum
this color have appeared on the market as a result of artificial lattice diffusion of beryllium. A star sapphire is a type of sapphire that exhibits a star-like
Sapphire
Intrinsic instability in flames
analysis treats the flame as a plane sheet to investigate its stability with the neglect of diffusion effects, whereas in reality, the flame has a definite
Darrieus–Landau_instability
Effective diffusion of a substance enhanced by shear flow, studied in fluid dynamics
Taylor dispersion or Taylor diffusion or Shear-induced dispersion is an apparent or effective diffusion of some scalar field arising on the large scale
Taylor_dispersion
Lois (1959). Effect of adding a combustible to atmosphere surrounding diffusion flame (Thesis). OCLC 45226021. "Alumni Awards 2015: Lifetime Achievement
1959_in_science
British mathematician
flow over multi-element wings; heat transfer and combustion including diffusion flames and detonation-wave generation; vortex ring dynamics; crystal growth
Norman_Riley_(professor)
American chemical engineer (1934–2020)
"Comparison of Measurements and Predictions of Flame Structure and Thermal NOx In a Swirling, Natural Gas Diffusion Flame," Combustion Science and Technology, 93:193–210
L._Douglas_Smoot
Process of hardening the surface of a metal object
acetylene torch set with a fuel-rich flame and quench it in a carbon-rich fluid such as oil. Carburization is a diffusion-controlled process, so the longer
Case-hardening
American engineer and academic
oxidation, laminar diffusion flames, microgravity combustion, wildland fires, diagnostics development, refrigerant flammability, hydrogen flames, and vehicle
Peter_B._Sunderland
Pitts, W. M. (1996). "Thin-filament pyrometry in flickering laminar diffusion flames". Proceedings of the Combustion Institute. 26: 1171–1179. doi:10
Thin-filament_pyrometry
Asymptotic analysis of combustion
counterflow diffusion flames for large activation energies. Acta Astronautica, 1(7-8), 1007–1039. Clarke, J. F. (1975). The pre-mixed flame with large
Activation_energy_asymptotics
Welding process
Transient liquid phase diffusion bonding (TLPDB) is a joining process that has been applied for bonding many metallic and ceramic systems which cannot
Transient liquid phase diffusion bonding
Transient_liquid_phase_diffusion_bonding
Israeli-American engineer and mathematician (born 1949)
Northwestern University University of Illinois at Urbana–Champaign Thesis Diffusion Flames in a Chamber for Large Activation Energy (1977) Doctoral advisor Geoffrey
Moshe_Matalon_(engineer)
American aeronautical engineer
Dahm, Werner J.A.; Mungal, M. Godfrey (1985). "Blowout of turbulent diffusion flames". Symposium (International) on Combustion. 20: 303–310. doi:10
James_Eugene_Broadwell
Physical phenomena
acoustics is dominant, intrinsic flame instabilities refer to instabilities produced by differential and preferential diffusion, thermal expansion, buoyancy
Combustion_instability
Dried grape
currants (black Corinthian raisins, Vitis vinifera L. var. Apyrena), and Flame grapes. Raisins are traditionally sun-dried but may also be artificially
Raisin
American aerospace engineer
Technology (Caltech) in 1982. Her dissertation, An Analytical Study of Diffusion Flames in Vortex Structures, was supervised by Frank E. Marble; she was Marble's
Ann_Karagozian
Genre of art
the 2020s, text-to-image models such as Midjourney, DALL-E and Stable Diffusion became widely available to the public, allowing users to quickly generate
AI_art
Patron saint of Corsica
refused because there was scant evidence of her existence. However, the diffusion of her cult continued and Pasquale Paoli created a short-lived Order of
Devota
Fabrication or exaggeration of victimhood
others, to manipulate others, a coping strategy, attention seeking or diffusion of responsibility. A person who repeatedly does this is known as a professional
Playing_the_victim
Mathematical modeling of chemical processes
reaction involves solving conservation equations describing convection, diffusion, and reaction source for each component species. ∂ ( ρ Y i ) ∂ t + ∇ ⋅
Chemical_reaction_model
Italian beef dish
finely chopped beef and cooked for a long time (from 2 to 4 hours) on a low flame, the other ingredients of the dish are butter, garlic, fennel seeds, and
Bruscitti
Device for measuring temperature
offices and businesses as the temperature sensors in thermostats, and also as flame sensors in safety devices for gas-powered appliances. In 1821, the German
Thermocouple
Chinese online novel
steady stream of herbs. Like a liquid green flame, the wind skyrocketed, green liquid fire sea diffusion between the layers of mist rose up, in that mist
Fights_Break_Spheres
Topics referred to by the same term
working fluid Caloric polynomial, a polynomial solution to the heat (or diffusion) equation in mathematics Caloric reflex test, test of the vestibulo-ocular
Caloric
Equation known for chaotic behavior
Kuramoto–Sivashinsky equation extend beyond its original context of flame propagation and reaction–diffusion systems. These additional applications include flows in
Kuramoto–Sivashinsky_equation
Dimensionless parameter in combustion
propagating flame on variations in the surface topology along the flame, associated with local flame front curvature and flow straining of the flame. There
Markstein_number
Immortal bird that is cyclically reborn
from the ashes of its predecessor. Some legends say it dies in a show of flames and combustion, while others say that it simply burns to death and decomposes
Phoenix_(mythology)
Theory on a long wave hydrodynamic model
A. (1982). Effects of molecular diffusion and of thermal expansion on the structure and dynamics of premixed flames in turbulent flows of large scale
Matalon–Matkowsky–Clavin–Joulin theory
Matalon–Matkowsky–Clavin–Joulin_theory
Log burnt on a hearth as a Christmas tradition
around the log and exchange Christmas greetings wrapped in the heat of the flames.In Val di Chiana, in Tuscany, it was customary for children, blindfolded
Yule_log
Metal heat treatment process
times and higher temperatures typically increase the depth of carbon diffusion. When the iron or steel is cooled rapidly by quenching, the higher carbon
Carburizing
Monumental capital discovered in India
the front, and only seven on the back. Below appears the main motif, a flame palmette, growing among pebbles. The front and the back of the Pataliputra
Pataliputra_capital
Fabrication process for joining materials
processes which bond without melting, such as pressure, cold welding, and diffusion bonding. Metal welding is distinct from lower-temperature bonding techniques
Welding
Heat treatment that alters the properties of a material
the diffusion of atoms within a solid material, so that the material progresses towards its equilibrium state. Heat increases the rate of diffusion by
Annealing_(materials_science)
Fluid flow that occurs due to heterogeneous fluid properties and body forces
place in most solids because neither bulk current flows nor significant diffusion of matter can take place. Granular convection is a similar phenomenon
Convection
American combustion scientist (1911–2011)
premixed flame problems and explained, for the first time in 1951, that the flames can be stabilized at short wavelengths due to diffusion and heat conduction
George_H._Markstein
Organic chemical compound
sources. Ether will ignite if exposed to an open flame, though due to its high flammability, an open flame is not required for ignition. Other possible ignition
Diethyl_ether
Dynamical study of growth of a surface
sandpile model Kuramoto–Sivashinsky equation (or the flame equation, for studying the surface of a flame front) They are studied for their fractal properties
Surface_growth
DIFFUSION FLAME
DIFFUSION FLAME
Boy/Male
Christian, German, Indian
The Effusion of them; A High Heap
Biblical
the effusion of them; a high heap;watchful;
Surname or Lastname
English
English : ethnic name for someone from Flanders. In the Middle Ages there was considerable commercial intercourse between England and the Netherlands, particularly in the wool trade, and many Flemish weavers and dyers settled in England. The word reflects a Norman French form of Old French flamenc, from the stem flam- + the Germanic suffix -ing. The surname is also common in south and east Scotland and in Ireland, where it is sometimes found in the Gaelicized form Pléimeann.German : variant of Flemming, cognate with 1.
Boy/Male
Biblical
Diffusion; inclination; theft.
Boy/Male
Tamil
Light, The ever new light, New lamp, The sweet smell of a pack of fundip mixed with a new flame
Girl/Female
Tamil
Flame or luster or glow or shine, Brightness
Boy/Male
Tamil
Prajvala | பà¯à®°à®œà¯à®µà®²à®¾
Flame
Prajvala | பà¯à®°à®œà¯à®µà®²à®¾
Biblical
effusion; inclination; theft
Girl/Female
Muslim
The effusion of them, A high heap
Biblical
effusion of blood
Girl/Female
Tamil
Flame or luster or glow or shine, Brightness
Girl/Female
Andhra, Gujarati, Hindu, Indian, Marathi, Oriya, Punjabi, Sikh, Tamil, Telugu
Radiance; Diffusing Light; Goddess Lakshmi; Money; Bright Light; Beautiful; Intelligent; Thankful; Modest
Surname or Lastname
English
English : distinguishing name for the older of two bearers of the same personal name, from Middle English eld ‘old’ (from Old English eald).Swedish : ornamental name from Old Norse eldr ‘flame’, ‘fire’.
Boy/Male
Tamil
Light, The ever new light, New lamp, The sweet smell of a pack of fundip mixed with a new flame
Girl/Female
Tamil
Flame or luster or glow or shine, Brightness
Boy/Male
Indian, Telugu
Radiance; Diffusing Light
Girl/Female
Tamil
Flame, Light, Shinning
Boy/Male
Biblical
Diffusion; inclination; theft.
Girl/Female
Biblical
Effusion of blood.
Girl/Female
Tamil
Flame, Light, Shinning
DIFFUSION FLAME
DIFFUSION FLAME
Surname or Lastname
English (Gloucestershire)
English (Gloucestershire) : variant spelling of Clutterbuck, a name of unknown origin, possibly a garbled form of a Dutch name.
Girl/Female
Indian, Sikh
Faster
Male
English
English variant spelling of Spanish Alphonso, ALPHONZO means "noble and ready."
Male
Irish
Irish and Scottish equivalent of English Willy, WYLIE means "will-helmet."
Girl/Female
Indian
Elvin beauty
Girl/Female
Gujarati, Indian, Malayalam
Torch; Sun Ray; Shining Light; Wicker; Reed; Shoot; Basket; Most Beautiful Woman in the World; A Lady Attending on Imogen; The Bright One; Similar to Helen
Surname or Lastname
English
English : ostensibly a nickname for a small man, but the vocabulary word was also a feudal term denoting a subtenant, and the surname is more probably a status name with this origin.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
The Moon
Girl/Female
Gujarati, Hindu, Indian, Kannada, Marathi, Sindhi, Tamil, Telugu
Surrounded by Glory; Shining; Powerful
Boy/Male
Tamil
DIFFUSION FLAME
DIFFUSION FLAME
DIFFUSION FLAME
DIFFUSION FLAME
DIFFUSION FLAME
n.
The act of passing by osmosis through animal membranes, as in the distribution of poisons, gases, etc., through the body. Unlike absorption, diffusion may go on after death, that is, after the blood ceases to circulate.
n.
One opposed to the diffusion of knowledge; an obscuriantist.
adv.
In a diffusive manner.
a.
Expansive; diffusive.
n.
A blending of one color into another; the spreading of one color over another, as on the feathers of birds.
n.
The act of diffusing, or the state of being diffused; a spreading; extension; dissemination; circulation; dispersion.
a.
Diffusing odor or scent; fragrant.
n.
Infusion.
n.
A flowing in; infusion.
a.
Prepared by diffusion through an animal membrane; as, dialyzed iron.
n.
A decoction or infusion.
v. t.
The act of infusing, pouring in, or instilling; instillation; as, the infusion of good principles into the mind; the infusion of ardor or zeal.
n.
Effusion; loss.
a.
Having the quality of diffusing; capable of spreading every way by flowing; spreading widely; widely reaching; copious; diffuse.
n.
The act of pouring out; as, effusion of water, of blood, of grace, of words, and the like.
n.
The emission and diffusion of rays of light.
n.
The act or process of suffusing, or state of being suffused; an overspreading.
a.
Having power to diffuse itself; diffusing itself.
n.
Act or state of swimming; suffusion.
n.
That with which a thing is suffused.