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Convection with two density gradients
Double diffusive convection is a fluid-dynamical phenomenon that describes a form of convection driven by two different density gradients, which have
Double_diffusive_convection
Fluid flow that occurs due to heterogeneous fluid properties and body forces
appear. Convection–diffusion equation Bénard cells Churchill–Bernstein equation Combined forced and natural convection Double diffusive convection Fluid
Convection
Combination of the diffusion and convection (advection) equations
equations Double diffusive convection Incompressible Navier–Stokes equations Natural convection Nernst–Planck equation Numerical solution of the convection–diffusion
Convection–diffusion_equation
Form of sea ice formed underwater between meltwater and seawater
interface between meltwater and seawater via the process of double-diffusive convection of heat and salt. False bottoms have been observed under drifting
False_bottom_(sea_ice)
Oceanographic Phenomenon
layers in the diffusive and salt-finger regimes. Furthermore, the algorithm removes salt-fingering interfaces and diffusive-convective interfaces outside
Thermohaline_staircase
Thermal motion of liquid or gas particles at temperatures above absolute zero
imagingPages displaying short descriptions of redirect targets Double diffusive convection – Convection with two density gradients Drag (physics) – Retarding force
Molecular_diffusion
Ratio of a fluid's advective and diffusive transport rates
advective transport rate diffusive transport rate . {\displaystyle \mathrm {Pe} ={\dfrac {\text{advective transport rate}}{\text{diffusive transport rate}}}
Péclet_number
Measure used in calculating seawater density gradient
J.; Özsoy, E. (2003-03-01). "The diffusive regime of double-diffusive convection". Progress in Oceanography. Double-Diffusion in Oceanography. 56 (3):
Density_ratio
Instrinsic flame instability
Diffusive–thermal instability or thermo–diffusive instability is an intrinsic flame instability that occurs both in premixed flames and in diffusion flames
Diffusive–thermal_instability
Seventh planet from the Sun
convection may take place in a set of compositionally different layers, which may inhibit upward heat transport; perhaps double diffusive convection is
Uranus
Parameter describing stability of a water column
local stability of an inviscid water column as it undergoes double-diffusive convection. The temperature and salinity attributes, which generally determine
Turner_angle
clouds and hurricanes. Atmospheric convection Bénard cells Churchill–Bernstein equation Double diffusive convection Heat transfer Heat conduction Thermal
Convective_mixing
methods are identical. Advanced Simulation Library Convection–diffusion equation Double diffusive convection An Album of Fluid Motion Lagrangian and Eulerian
Numerical solution of the convection–diffusion equation
Numerical_solution_of_the_convection–diffusion_equation
Gradient in the rates of molecular diffusion
sciences and technologies, as described for the following contexts: Double diffusive convection, in which density differences, often reflecting temperature differences
Diffusion_gradient
dynamics, namely in double-diffusive convection of a small Prandtl number fluid. Double diffusive convection occurs when convection of the fluid is driven
Blue_sky_catastrophe
temperature, for instance. This may form diffusive layers or even salt fingering, when the surfaces of the diffusive layers become so wavy that there are
Stable and unstable stratification
Stable_and_unstable_stratification
equation Continuity equation for conservation laws Convection–diffusion equation Double diffusive convection Davey–Stewartson equation Euler–Tricomi equation
List of named differential equations
List_of_named_differential_equations
Mechanical engineering professor (born 1939)
context of radiation transfer in scattering-absorbing media and double diffusive convection. He has been listed as an ISI Highly Cited Author in Engineering
Frank_P._Incropera
Glacier tongue in Antarctica
effect on the local ocean. Its melting has been thought to create Double diffusive convection effects. A 2010 expedition funded by the Marsden Fund supported
Erebus_Glacier_Tongue
concentration and temperature is an important field of study in double diffusive convection. If density changes due to both temperature and salinity are
Non-dimensionalization and scaling of the Navier–Stokes equations
Non-dimensionalization_and_scaling_of_the_Navier–Stokes_equations
Australian academic
Cambridge University in 1969, on rotating and stratified flows, and double-diffusive convection. Baines initiated his career as a scientific officer at Aeronautical
Peter_Baines_(academic)
Underwater current of sediment-laden water moving downslope
sedimentation beneath particle-laden flows in lakes and the ocean due to double-diffusive convection". Geophysical Research Letters. 43 (20): 10, 883–10, 890. Bibcode:2016GeoRL
Turbidity_current
American oceanographer
mathematically describe salt fingering, a phenomenon produced by Double diffusive convection. Born January 22, 1929, and a native of New York City, Melvin
Melvin_Stern
University researcher
Security Implications of Climate Change (Springer, 2012), and Double Diffusive Convection (AGU, 1994). He is editor-in-chief of the journal Environmental
Harindra_Joseph_S._Fernando
Heat at the bottom of these stable salinity gradients causes double-diffusive convection events. Deep-sea anoxic brines (referred to as DHABs, deep hypersaline
Red Sea brine pool microbiology
Red_Sea_brine_pool_microbiology
Australian geophysicist (1930–2022)
gravity currents entrainment in density stratified shear flows, double diffusive convection mixed layer dynamics in the ocean and the dynamics of ventilated
Stewart_Turner
processes underlying a diverse range phenomena. His studies of double-diffusive convective processes have shown how they influence the development of density
Paul_Linden
Thermal engineering discipline concerning transfer of heat in physical systems
classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, transfer of energy by phase changes, and evaporative
Heat_transfer
Visible mass of particles suspended in the atmosphere
with little or no convective activity, although denser patches may occasionally show buildups caused by limited high-level convection where the air is
Cloud
Chilean physicist
patterns on mussels and snails Simple experimental proof of double diffusive convection. This phenomenon predicts the impossibiliy of using drinking
Mario_Markus
Dosimetry Double-exchange mechanism Double-slit experiment Double Chooz Double beta decay Double diffusive convection Double electron capture Double inverted
Index_of_physics_articles_(D)
Belgian astrophysicist (1914–1988)
in convectively-unstable regions that are stabilised, one expects double-diffusive mixing, known in stellar astrophysics as semiconvection. "Fondation
Paul_Ledoux
Mixing process of warm, salty water with colder, fresher water
Salt fingering is a mixing process, example of double diffusive instability, that occurs when relatively warm, salty water overlies relatively colder,
Salt_fingering
Equations of motion for viscous fluids
_{\Omega }\mathbf {f} \cdot \mathbf {v} } Counter-integrating by parts the diffusive and the pressure terms and by using Gauss's theorem: − ∫ Ω μ Δ u ⋅ v =
Navier–Stokes_equations
Large sill-like body of igneous rock
S2CID 216225052. Irvine TN (1980) "Magmatic infiltration metasomatism, double-diffusive fractional crystallization, and adcumulus growth in the Muskox intrusion
Layered_intrusion
Physical process that generates a star's magnetic field
balancing diffusive or ohmic decay. Such systems are called self-sustaining dynamos. The Sun is a self-sustaining dynamo that converts convective motion
Solar_dynamo
vertical extent. Of the multi-level genus-types, those with the greatest convective activity are often grouped separately as towering vertical. The genus
List_of_cloud_types
Measure of how well an object, per unit of area, resists conductive flow of heat
modes: conduction, convection, and radiation. The primary heat loss across an uninsulated air-filled space is natural convection, which occurs because
R-value_(insulation)
Mechanism by which a celestial body generates a magnetic field
outer core must be convecting. The convection is likely some combination of thermal and compositional convection. The mantle controls the rate at which
Dynamo_theory
Measurement of capacity of a material to conduct heat
bottom. Heat is supplied at the top and made to move downwards to stop any convection within the sample. Measurements are taken after the sample has reached
Thermal conductivity measurement
Thermal_conductivity_measurement
Red supergiant star in the constellation Orion
measurements. The 1950s and 1960s saw two developments that affected stellar convection theory in red supergiants: the Stratoscope projects and the 1958 publication
Betelgeuse
Component of stress coplanar with a material cross section
reaction rate is controlled only by diffusion. The resolution of the convective-diffusive equation in the near-wall region of the microelectrode lead to analytical
Shear_stress
Machine to increase pressure of gas by reducing its volume
124 MPa). In certain applications, such as air compression, multi-stage double-acting compressors are said to be the most efficient compressors available
Compressor
Type of star larger than main-sequence but smaller than a giant
internal configuration of the star. Stars less massive than about 0.4 M☉ are convective throughout most of the star. These stars continue to fuse hydrogen in
Subgiant
Method for producing electronic circuits
automation, by focused infrared beam (FIB) or localized convection equipment. If the circuit board is double-sided then this printing, placement, reflow process
Surface-mount_technology
Architectural engineering that uses the Sun's heat without electric or mechanical systems
from the sunspace to the indoor space by convection (like a vented thermal storage wall). In cold climates, double glazing should be used to reduce conductive
Passive_solar_building_design
Mathematical model
energy function depending on an order parameter (the phase field) and a diffusive field (variational formulations). Equations of the model are then obtained
Phase-field_model
Engineer, inventor, academic and author
worldcat.org. Khanafer, K.; Vafai, K. (October 22, 2002). "Double-Diffusive Mixed Convection in a Lid-Driven Enclosure Filled with a Fluid-Saturated Porous
Kambiz_Vafai
Meteorological phenomenon
seasonal cycle is more subtle, as the convection is constrained by the distribution of ocean temperatures. Sometimes, a double ITCZ forms, with one located north
Intertropical Convergence Zone
Intertropical_Convergence_Zone
Electrical component that can break an electrical circuit
minimize or prevent arc formation. A plasma is hot and will rise due to convection air currents. The arc can be quenched with a series of non-conductive
Switch
Professor of mathematics and astronomy (1936–2020)
identification of a period-doubling route to chaos in a system of partial differential equations describing doubly-diffusive convection. He has made wide-ranging
Nigel_Weiss
humidity, or salinity. In the context of meteorology, the related term convection generally refers to vertical transport. actinoform Describing a collection
Glossary_of_meteorology
Equation in stellar astrophysics
dissipation through its bulk. Where there is no heat convection, this dissipation happens mainly by photons diffusing. By integrating Fick's first law over the surface
Mass–luminosity_relation
Electromagnetic radiation generated by the thermal motion of particles
the fundamental mechanisms of heat transfer, along with conduction and convection. The primary method by which the Sun transfers heat to the Earth is thermal
Thermal_radiation
Oceanic basin in the South Pacific Ocean between Fiji and Tonga
accommodates east to west extension but so does the FRSC to its east and such a double parallel arrangement has not been identified in any other back-arc basin
Lau_Basin
United States tornado outbreak in May 2025
multiple outflow boundaries draped across Oklahoma and Arkansas from prior convection. A broad warm sector featured surface dew points in the 70–73°F (21-23°C)
Tornado outbreak of May 18–21, 2025
Tornado_outbreak_of_May_18–21,_2025
High vacuum pump
ranges of 1×10−10 to 1×10−2 mbar (1×10−8 to 1 Pa). They are driven only by convection and thus have a very low energy efficiency. One major disadvantage of
Diffusion_pump
Conduit used in heating, ventilation, and air conditioning
wrapped externally with fiberglass blankets (duct wrap). When necessary, a double walled duct is used. This will usually have an inner perforated liner, then
Duct_(flow)
EF4 tornado in Mississippi, US
the area possibly stemming from the regenerative convective clusters along the dryline and convective outflow. With strong wind shear and surface dew points
2014 Louisville, Mississippi tornado
2014_Louisville,_Mississippi_tornado
1925 tornado in Missouri, Illinois and Indiana, U.S.
the warm sector, leaving the Tri-State supercell undisturbed by nearby convection. By 12:00 p.m. CST (18:00 UTC), the deepening surface low was centered
1925_Tri-State_tornado
Sustainable energy from sea and river water
bottom of the saltwater pond is absorbed as heat. The effect of natural convection, wherein "heat rises", is blocked using density differences between the
Osmotic_power
American mathematician
1993 at the University of Virginia; her dissertation, Solution of Convective-Diffusive Flow Problems with Newton-Like Methods, was supervised by James McDonough
Lois_Curfman_McInnes
Technology of indoor and vehicular environmental comfort
transfers that energy to the spaces to be heated, where it is delivered by convection, radiation, or both. Small space heaters may also be used to heat individual
Heating, ventilation, and air conditioning
Heating,_ventilation,_and_air_conditioning
Electric light bulb with a resistively heated wire filament
efficiency loss due to reduced incandescence—by heat conduction and heat convection. Early lamps used only a vacuum to protect the filament from oxygen. The
Incandescent_light_bulb
Constant speed wavetrain
hydrodynamics, convection patterns often involve periodic travelling waves. Specific instances include binary fluid convection and heated wire convection. Patterns
Periodic_travelling_wave
Capacity of a material to conduct heat
gases and liquids, provided other modes of energy transport, such as convection and radiation, are eliminated or accounted for. The preceding derivation
Thermal conductivity and resistivity
Thermal_conductivity_and_resistivity
Alternative to silicon-based photovoltaics
solvent and spin coated onto a substrate. Subsequent evaporation and convective self-assembly during spinning results in dense layers of well crystallized
Perovskite_solar_cell
NOAA weather modification program
towers, latent heat would be released. This would trigger the start of new convection, which would then cause a new eyewall. Since the new eyewall was outside
Project_Stormfury
Atmospheric effect caused by the solar wind
(2009). "Evidence that solar wind fluctuations substantially affect global convection and substorm occurrence". J. Geophys. Res. 114 (A11306): 1–14. Bibcode:2009JGRA
Aurora
British military officer, scientist and inventor
of these natural materials arise from the fact that they inhibit the convection of air. He then inferred — incorrectly — that air and, in fact, all gases
Benjamin_Thompson
Method of casting near-net-shape metal components
being accelerated by the gas. Droplets cool in-flight predominantly by convection and radiation, and can experience undercooling of up to 300 °C (572 °F)
Spray_forming
List of largest planets by size
Strassmeier, Klaus; Beatty, Thomas (2022-02-01). "KELT-9 as an Eclipsing Double-lined Spectroscopic Binary: A Unique and Self-consistent Solution to the
List_of_largest_exoplanets
Rechargeable battery type often used in motor vehicles
sulfuric acid concentration is higher, the liquid will tend to circulate by convection. Therefore, a liquid-medium cell tends to rapidly discharge and rapidly
Lead–acid_battery
Device used to regulate and circulate air as part of an HVAC system
handlers will be manufactured from a square section steel framing system with double skinned and insulated infill panels. Such constructions reduce heat loss
Air_handler
Astrophysical phenomenon
possible explanation for this asymmetry is large-scale convection above the core. The convection can create radial variations in density giving rise to
Supernova
Window protection with horizontal angled slats
systems can limit glare and of redirect diffuse light. Such louvers may be integrated in between two panes of double glazing. In industrial facilities such
Louver
Earth's most severe extinction event
causing this region of the ocean to be hit by especially severe anoxia. Convective overturn helped facilitate the expansion of anoxia throughout the water
Permian–Triassic extinction event
Permian–Triassic_extinction_event
Galaxy containing the Solar System
Star HD 140283 Using MESA and Interferometry and Implications for 1D Convection". Research Notes of the AAS. 5 (5): 117. arXiv:2105.11311. Bibcode:2021RNAAS
Milky_Way
Reaction–diffusion equation
split into three regions, an inner diffusive-reactive region flanked on either side by two outer convective-diffusive regions. The problem for outer region
ZFK_equation
Device that controls current between electrodes
the anode (plate) as infrared radiation, and by convection of air over the tube envelope. Convection is not possible inside most tubes since the anode
Vacuum_tube
2011 nuclear accident in Japan
adopt the principle of passive nuclear safety. They take advantage of convection and gravity to ensure an adequate supply of cooling water to handle the
Fukushima_nuclear_accident
Type of furnace used for smelting to produce industrial metals
(such as reverberatory furnaces) are naturally aspirated, usually by the convection of hot gases in a chimney flue. According to this broad definition, bloomeries
Blast_furnace
Process of mechanically stirring a heterogeneous mixture to homogenize it
in the mixing process can be determined: convective mixing and intensive mixing. In the case of convective mixing material in the mixer is transported
Mixing_(process_engineering)
Astronomical object emitting X-rays
is in a rapid boiling, or convective state. When combined with the rapid rotation that most brown dwarfs exhibit, convection sets up conditions for the
Astrophysical_X-ray_source
Device which reduces humidity
that block other ambient gases besides water vapor. Water vapor will then diffuse through these membranes under a concentration difference. Such a difference
Dehumidifier
Class of chemical substance
synthesis can be carried out conventionally in a teflon reactor in a convection oven or in glass reactors in a microwave oven (high-throughput microwave
Metal–organic_framework
Chemical compound
the interface, the rate of this reduction appears to be controlled by convective diffusion or mass transfer from the reacting surface. Silicon monoxide
Silicon_monoxide
Periodic change in the Sun's activity
flux in the photosphere. This flux is dispersed and churned by turbulent convection and solar large-scale flows. These transport mechanisms lead to the accumulation
Solar_cycle
Largest moon of Saturn
during the southern summer generate uplift in the atmosphere, resulting in convection. This explanation is complicated by the fact that cloud formation has
Titan_(moon)
energy. Within a star, it is an important factor in determining whether convection occurs. open cluster A gravitationally bound group of up to one thousand
Glossary_of_astronomy
Species of fish
conductivity, according to Fourier's law of heat conduction. Their heat convection is also reduced. Since the heat transfer coefficient depends on an animal's
Southern_bluefin_tuna
Chemical element with atomic number 92 (U)
that keeps the Earth's outer core in the liquid state and drives mantle convection, which in turn drives plate tectonics. Uranium's concentration in the
Uranium
Pursuit of severe weather conditions
time and effort in learning meteorology and the intricacies of severe convective storm prediction through both study and experience. Besides the copious
Storm_chasing
Cloud of debris and smoke from a large explosion
cloud reaches the tropopause, it may spread against the wind, because its convection speed is higher than the ambient wind speed. At the tropopause, the cloud
Mushroom_cloud
Model of electrically conducting fluids
Simulations: Performance Quantification of Magnetopause Distances and Convection Potential Predictions". Frontiers in Astronomy and Space Sciences. 8 637197:
Magnetohydrodynamics
the structure of a macromolecule, oligomer, polymer, block, or chain. convection cooling curve A line graph representing the change between different phases
Glossary_of_chemistry_terms
Type of star cluster
this underabundance is not yet fully understood, one possibility is that convection in stellar interiors can 'overshoot' into regions where radiation is normally
Open_cluster
classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers
Glossary_of_engineering:_A–L
Adages and sayings named after a person
Newton's law of cooling: The rate of cooling (or heating) of a body due to convection is proportional to the difference between the body temperature and the
List_of_eponymous_laws
Electric light that produces light using LEDs
suitably designed heat sink or cooling fin, from where it is dissipated via convection. Very high power lamps for industrial uses are frequently equipped with
LED_lamp
DOUBLE DIFFUSIVE-CONVECTION
DOUBLE DIFFUSIVE-CONVECTION
Male
English
Anglicized form of Irish Gaelic Dubhghall, DOYLE means "black stranger."Â
Surname or Lastname
English
English : possibly a variant of Goble or Gobel.Perhaps an Americanized spelling of French Gobeil.
Surname or Lastname
English
English : from a variant of the medieval personal name Tebald, Tibalt (see Theobald).
Boy/Male
Hindu, Indian
Money; Russian Currency
Surname or Lastname
English
English : from the medieval personal name Dobbe, one of several pet forms of Robert in which the initial letter was altered. Compare Hobbs.
Surname or Lastname
English
English : variant of Dibble.Altered spelling of German Deibel or Deubel.
Girl/Female
Christian, Hindu, Indian, Kannada
Money
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : nickname from Old French doubel ‘twin’ (literally ‘double’, from Late Latin duplus, classical Latin duplex, from du(o) ‘two’ + plek, a root meaning ‘fold’).
Surname or Lastname
French
French : from a reduced form of the Germanic personal name Hildo (see Hildebrand, Houde).French : habitational name from any of several places in Normandy called La Houle or Les Houles, named in Old French with the singular or plural of houle ‘cave’.English : variant of Hole.
Surname or Lastname
English
English : variant spelling of Dowdell.Possibly an altered spelling of German Daudel, Dautel, variants of Dietz.
Surname or Lastname
English
English : variant of Coble.Americanized spelling of German Kobel.
Boy/Male
Biblical
Diffusion; inclination; theft.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : variant of Double.In some cases, probably an altered spelling of South German Dobel or Döbel, a topographic name for someone who lived in a gorge or deep valley, Middle High German southern dialect tobel.
Boy/Male
Biblical
Diffusion; inclination; theft.
Girl/Female
Latin
Mistress of the home.
Boy/Male
Indian, Telugu
Radiance; Diffusing Light
Surname or Lastname
English
English : habitational name from Wombwell in South Yorkshire, named with the Old English byname Wamba meaning ‘belly’ (or this word used in a transferred topographical sense) + Old English well(a) ‘spring’, ‘stream’.
Girl/Female
Scottish
From the Gaelic 'dubhglas' meaning dark water, dark stream, or from the dark river.
Boy/Male
Hindu
Born during the rainy season, Money
Male
English
English name derived from the vocabulary word, from Latin nobilis, NOBLE means "noble."
DOUBLE DIFFUSIVE-CONVECTION
DOUBLE DIFFUSIVE-CONVECTION
Boy/Male
Tamil
Kavyansh | காவà¯à®¯à®‚à®·Â
Intelligent and born with poetry
Boy/Male
Tamil
Arunachaleshwara | à®…à®°à¯à®¨à®¾à®šà®²à¯‡à®·à¯à®µà®¾à®°à®¾
Lord of the hills of Sun
Boy/Male
Tamil
Ploughman
Boy/Male
Tamil
Pleased, Satisfied, The souls ability to see
Boy/Male
Hindu
Lord of the earth
Female
Gaelic
Old Gaelic name MUIRNE means "beloved."
Boy/Male
Hindu, Indian
Brilliance
Surname or Lastname
English
English : from an Old English personal name, either Rǣdweald or Rǣdwulf. The first element in each is rǣd ‘counsel’, ‘advice’; the final elements are weald ‘rule’ and wulf ‘wolf’.English : topographic name, from Old English (ge)ryd(d) ‘cleared’ + weald ‘woodland’, ‘high woodland subsequently cleared’.
Boy/Male
British, English
Born During a Rain
Girl/Female
Indian
Glowing Princess
DOUBLE DIFFUSIVE-CONVECTION
DOUBLE DIFFUSIVE-CONVECTION
DOUBLE DIFFUSIVE-CONVECTION
DOUBLE DIFFUSIVE-CONVECTION
DOUBLE DIFFUSIVE-CONVECTION
n.
One who, or that which, doubles.
adv.
In a double degree; doubly.
n.
The state of being double or doubled.
a.
To increase by adding an equal number, quantity, length, value, or the like; multiply by two; to double a sum of money; to double a number, or length.
n.
The act of diffusing, or the state of being diffused; a spreading; extension; dissemination; circulation; dispersion.
n.
Double-quick time, step, or march.
n.
Double beer; strong beer.
a.
Poured out; widely spread; not restrained; copious; full; esp., of style, opposed to concise or terse; verbose; prolix; as, a diffuse style; a diffuse writer.
n.
A game between two pairs of players; as, a first prize for doubles.
a.
Having the quality of diffusing; capable of spreading every way by flowing; spreading widely; widely reaching; copious; diffuse.
imp. & p. p.
of Double
a.
To be the double of; to exceed by twofold; to contain or be worth twice as much as.
n.
Among compositors, a doublet (see Doublet, 2.); among pressmen, a sheet that is twice pulled, and blurred.
p. pr. & vb. n.
of Diffuse
a.
Having power to diffuse itself; diffusing itself.
v. i.
To pass by spreading every way, to diffuse itself.
adv.
In a diffusive manner.
adv.
Twice; doubly.
n.
The act of one that doubles; a making double; reduplication; also, that which is doubled.
a.
Double; doubled; reduplicative; repeated.