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Essential oil diffuser
compressed air or ultrasonics. An evaporative diffuser is a device that uses a pad, filter, or reeds to diffuse the essential oils. One of the disadvantages
Aroma_lamp
Partial differential equation describing the evolution of temperature in a region
the purpose of modeling how a quantity such as heat diffuses through a given region. Since then, the heat equation and its variants have been found to be
Heat_equation
Cooking utensil
Cooking portal A heat diffuser, flame tamer, or simmering plate (UK) is a cooking utensil that is placed on top of a burner on a cooktop to separate the
Heat_diffuser
Topics referred to by the same term
Look up diffuser or diffusers in Wiktionary, the free dictionary. Diffuser may refer to: Diffuser (automotive), a shaped section of a car's underbody
Diffuser
Stovetop toaster and grill
pumpkin seeds. A brustolina can also be used as a heat diffuser, to provide well-distributed low heat, for example for cooking rice. Similar grills are
Brustolina
Index of articles associated with the same name
different mediums. Diffusivity may refer to: Thermal diffusivity, diffusivity of heat Diffusivity of mass: Mass diffusivity, molecular diffusivity (often called
Diffusivity
Aerodynamic surface
bottom and diffuser. This transition is where the lowest pressure generally is located and is called the throat of the diffuser. The diffuser then eases
Diffuser_(automotive)
Rate at which heat spreads throughout a material
thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. It is a measure of the rate of heat transfer
Thermal_diffusivity
Type of energy transfer
In thermodynamics, heat is defined as energy in transfer between a body and its surroundings, other than through thermodynamic work or through transfer
Heat
Thermal engineering discipline concerning transfer of heat in physical systems
Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical
Heat_transfer
Ratio of kinematic viscosity to thermal diffusivity
so that momentum diffuses more readily. The Prandtl numbers of gases are about 1, which indicates that momentum and heat diffuse at about the same rate
Prandtl_number
Magnetic confinement fusion device component
separatrix-bounded magnetic topology using special magnetic coils. Particles and heat diffusing outward from the main plasma are diverted and follow the 'open' magnetic
Divertor
Mixing process of warm, salty water with colder, fresher water
double diffusive instability, that occurs when relatively warm, salty water overlies relatively colder, fresher water. It is driven by the fact that heat diffuses
Salt_fingering
Study of rates of change
{\displaystyle F(t)=m{\frac {d^{2}x}{dt^{2}}}.} The heat equation in one space variable, which describes how heat diffuses through a straight rod, is the partial differential
Differential_calculus
Region of base material which is altered (but not melted) during heat welding
concentration of heat input by the welding process. The thermal diffusivity of the base material plays a large role—if the diffusivity is high, the material
Heat-affected_zone
Possible fate of the universe
The heat death of the universe (also known as the Big Chill or the Big Freeze) is a scientific hypothesis regarding the ultimate fate of the universe which
Heat_death_of_the_universe
Kitchen appliance
handle and that was used to heat food on the stoves of kitchens used in the Chilean countryside, serving as a heat diffuser. One of its characteristics
Chilean_toaster
Thermal motion of liquid or gas particles at temperatures above absolute zero
usually expressed as the number of moles diffusing across unit area in unit time. As with the basic equation of heat transfer, this indicates that the rate
Molecular_diffusion
Process of heating something to alter it
Heat treating (or heat treatment) is a group of industrial, thermal and metalworking processes used to alter the physical, and sometimes chemical properties
Heat_treating
Heat-transfer device that employs phase transition
A heat pipe is a heat-transfer device that employs phase transition to transfer heat between two solid interfaces. At the hot interface of a heat pipe
Heat_pipe
Electromagnetic radiation generated by the thermal motion of particles
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
Area of mathematical study
objects modelled by fractals. It studies questions such as "how does heat diffuse in a fractal?" and "how does a fractal vibrate?" In the smooth case the
Analysis_on_fractals
Process by which heat is transferred within an object
Thermal conduction is the diffusion of thermal energy (heat) within one material or between materials in contact. The higher temperature object has molecules
Thermal_conduction
"The Trick to Treats" "Tricks for Treats" Candy: brittle, jelly, taffy Heat diffuser October 26, 2003 (2003-10-26) EA1G13 711 "Potato, My Sweet" Sweet potato
List_of_Good_Eats_episodes
Applies an electric current to heat or cool materials
Thermoelectric heat pumps use the thermoelectric effect, specifically the Peltier effect, to heat or cool materials by applying an electrical current across
Thermoelectric_heat_pump
Passive heat exchanger that transfers heat
A heat sink (also commonly spelled heatsink) is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a
Heat_sink
Proportionality constant in some physical laws
Diffusivity, mass diffusivity or diffusion coefficient is usually written as the proportionality constant between the molar flux due to molecular diffusion
Mass_diffusivity
Ratio of thermal diffusivity to mass diffusivity
as the ratio of thermal diffusivity to mass diffusivity. It is used to characterize fluid flows where there is simultaneous heat and mass transfer. The
Lewis_number
Fluid flow that occurs due to heterogeneous fluid properties and body forces
Convection is the transfer of heat through the physical movement of fluids (liquids or gases), where warmer, less-dense material rises and cooler, denser
Convection
Technologies to store thermal energy
include heat or cold produced with heat pumps from off-peak, lower cost electric power, a practice called peak shaving; heat from combined heat and power
Thermal_energy_storage
Tendency of electrical circuits to produce excess heat while operating
the specific heat k = κ ρ C {\displaystyle k={\frac {\kappa }{\rho C}}\,} the thermal diffusivity and g {\displaystyle g} is the rate of heat generation
Heat generation in integrated circuits
Heat_generation_in_integrated_circuits
Dimensionless quantity related to transient heat conduction
the modern understanding of heat conduction. The time scale for diffusion characterizes the time needed for heat to diffuse over a distance, L {\displaystyle
Fourier_number
Dowagiac, Michigan Personalities,” by Barbara and Grafton Cook "Using a Heat Diffuser with stoves". 5 January 2020. Retrieved 9 March 2020. Southwestern Michigan
Round_Oak_Stove_Company
Thermal quality
The volumetric heat capacity of a material is the heat capacity of a sample of the substance divided by the volume of the sample. It is the amount of
Volumetric_heat_capacity
Fluid used as an intermediary in a cooling or heating process
In fluid thermodynamics, a heat transfer fluid (HTF) is a gas or liquid that takes part in heat transfer by serving as an intermediary in cooling on one
Heat-transfer_fluid
Capacity of a material to conduct heat
thermal conductivity of a material is a measure of its ability to conduct heat. It is commonly denoted by k {\displaystyle k} , λ {\displaystyle \lambda
Thermal conductivity and resistivity
Thermal_conductivity_and_resistivity
Sub-class of turbomachinery
slowing the flow through a diffuser. The static pressure rise in the impeller may roughly equal the rise in the diffuser. A simple centrifugal compressor
Centrifugal_compressor
Preservation of biological tissue
Heat fixation generally preserves overall morphology but not internal structures. Heat denatures the proteolytic enzyme and prevents autolysis. Heat fixation
Fixation_(histology)
Electronic household appliance for personal care
concentrator does the opposite of a diffuser. It makes the end of the hair dryer narrower and thus helps to concentrate the heat into one spot to make it dry
Hair_dryer
Method of measuring thermal diffusivity of a material
flash method is used to measure thermal diffusivity of a variety of different materials. An energy pulse heats one side of a plane-parallel sample and
Laser_flash_analysis
Exchange of mass, energy, and momentum between observed and studied systems
{\partial Ca}{\partial y}}} where D is the diffusivity constant. Many important engineered systems involve heat transfer. Some examples are the heating and
Transport_phenomena
Dimensionless quantity in fluid dynamics
of an object immersed in the medium, or of a channel such as a nozzle, diffuser or wind tunnel channelling the medium. As the Mach number is defined as
Mach_number
Materials engineered to have properties that have not yet been found in nature
found in nature, when homogeneous, are thermally isotropic, meaning heat diffuses at roughly the same rate in all directions. Thermal metamaterials, as
Metamaterial
Technique for ventilation of a building
users can adjust the amount of air that is delivered by the diffuser though rotating the diffuser top. Cooling load profiles for UFAD systems and overhead
Underfloor_air_distribution
ratio between the momentum eddy diffusivity and the heat transfer eddy diffusivity. It is useful for solving the heat transfer problem of turbulent boundary
Turbulent_Prandtl_number
Convection with two density gradients
example of double diffusive convection is in oceanography, where heat and salt concentrations exist with different gradients and diffuse at differing rates
Double_diffusive_convection
Measure of temperature relative to absolute zero
in Fig. 1. As can be seen in that animation, not only does momentum (heat) diffuse throughout the volume of the gas through serial collisions, but entire
Thermodynamic_temperature
Cooking method using dry air heat
Maillard browning on the surface of the food. Roasting uses indirect, diffused heat (as in an oven), and is suitable for slower cooking of meat in a larger
Roasting
Photographic lighting device
act as an efficient reflector. In some commercially available models the diffuser is removable to allow the light to be used alone as a floodlight or with
Softbox
Ratio of a fluid's kinematic viscosity to mass diffusivity
Number. The heat transfer analog of the Schmidt number is the Prandtl number (Pr). The ratio of thermal diffusivity to mass diffusivity is the Lewis
Schmidt_number
Autoimmune endocrine disease
muscle weakness, sleeping problems, a fast heartbeat, poor tolerance of heat, diarrhea and unintentional weight loss. Other symptoms may include thickening
Graves'_disease
Technology of indoor and vehicular environmental comfort
supplemental heat for heat pump systems. The heat pump gained popularity in the 1950s in Japan and the United States. Heat pumps can extract heat from various
Heating, ventilation, and air conditioning
Heating,_ventilation,_and_air_conditioning
Measure of how well an object, per unit of area, resists conductive flow of heat
a window, or a complete wall or ceiling, resists the conductive flow of heat, in the context of construction. The higher the R-value, the more insulating
R-value_(insulation)
Room air distribution strategy
handling unit (AHU) through a low induction air diffuser. Diffuser types vary by applications. Diffusers can be located against a wall ("wall-mounted")
Displacement_ventilation
Species of flowering plant with edible seeds
heat cultivation. Treating the chickpea with a constant heat source increases its protein content almost threefold. Consequently, the impact of heat cultivation
Chickpea
Supersonic atmospheric jet engine
that occurs at the inlet entrance lip. The diffuser in this case consists of two parts: the supersonic diffuser, with shock waves external to the inlet,
Ramjet
Ratio of a fluid's advective and diffusive transport rates
will often have different Péclet numbers for heat and mass. This can lead to the phenomenon of double diffusive convection. In the context of particulate
Péclet_number
specific heat, α = κ ρ C {\displaystyle \alpha ={\frac {\kappa }{\rho C}}} , the thermal diffusivity and g {\displaystyle g} is the rate of heat generation
Thermal simulations for integrated circuits
Thermal_simulations_for_integrated_circuits
Dimensionless quantity associated with free convection of a fluid
turbulent flow. Below a certain critical value, there is no fluid motion and heat transfer is by conduction rather than convection. For most engineering purposes
Rayleigh_number
Ratio of the thermal resistances of a body's interior to its surface
The Biot number (Bi) is a dimensionless quantity used in heat transfer calculations, named for the eighteenth-century French physicist Jean-Baptiste Biot
Biot_number
Human-caused changes to climate on Earth
industrial practices release greenhouse gases. These gases absorb some of the heat that the Earth radiates after it warms from sunlight, warming the lower atmosphere
Climate_change
Transport of dissolved species from the highest to the lowest concentration region
gradient in Gibbs free energy or chemical potential. It is possible to diffuse "uphill" from a region of lower concentration to a region of higher concentration
Diffusion
HVAC device
the fan coil unit itself, with the return air grille and a supply air diffuser set into that enclosure to distribute the air. A concealed fan coil unit
Fan_coil_unit
End cap on a cylindrically shaped pressure vessel
cans. It is an inverted torispherical head. This is a cone-shaped head. Heat treatment may be required after cold forming, but not for heads formed by
Head_(vessel)
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 Arctic
False_bottom_(sea_ice)
Delayed temperature response
temperature response during heat transfers. The phenomenon exists because of a body's ability to both store and transport heat relative to its environment
Thermal_inertia
Model compatible with special relativity
temperature, t is time, α = k/(ρ c) is thermal diffusivity, k is thermal conductivity, ρ is density, and c is specific heat capacity. The Laplace operator, ∇ 2 {\textstyle
Relativistic_heat_conduction
Component in combustion engines
components of a centrifugal supercharger are the volute (compressor housing), diffuser, impeller and transmission. Volutes are typically cast into a form from
Centrifugal-type_supercharger
Ability of a material to exchange energy with surroundings
volumetric heat capacity ( ρ c p {\displaystyle \rho c_{p}} ) or as the ratio of thermal conductivity to the square root of thermal diffusivity ( α {\displaystyle
Thermal_effusivity
Branch of physics
Heat transfer physics describes the kinetics of energy storage, transport, and energy transformation by principal energy carriers: phonons (lattice vibration
Heat_transfer_physics
Measurement indicator of fuel conversion
components of a ramjet, diffuser, combustion chamber and nozzle. At supersonic airspeeds air compression starts at the tip of the diffuser cone and continues
Jet_engine_performance
Net movement of mass from one location, phase, etc. to another
processes, for instance in industrial cooling towers. These towers couple heat transfer to mass transfer by allowing hot water to flow in contact with air
Mass_transfer
Process of changing energy
uselessly diffuse, equilibrated heat. This fate is known as "heat death" or "the Big Freeze." In practice, the conversion of free energy to heat can be observed
Energy_transformation
Organism that maintains body temperature largely by heat from internal bodily functions
and θέρμη thermē "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat released by its internal
Endotherm
Direct conversion of temperature differences to electric voltage and vice versa
different temperature on each side. Conversely, when a voltage is applied to it, heat is transferred from one side to the other, creating a temperature difference
Thermoelectric_effect
of the different phenomena of inertia, viscosity, conductive heat transport, and diffusive mass transport. (In the table, the diagonals give common symbols
Dimensionless numbers in fluid mechanics
Dimensionless_numbers_in_fluid_mechanics
Parameter describing stability of a water column
intermediate attributes, but not intermediate density. In the ocean, heat diffuses faster than salt. If colder, fresher water overlies warmer, saltier
Turner_angle
Formula One racing automobile
difference, which was focused on the rear so-called 'double-decker diffuser'. The diffuser is at the rear of the car and is a route to get downforce by using
Brawn_BGP_001
Type of boundary condition in mathematics
common physical example is in heat transfer, where a surface might lose heat to the environment via convection. The rate of heat flow (related to the derivative
Robin_boundary_condition
Electronic light
Retrieved February 2, 2014. "Flameless candle incorporating insect repellant diffuser and an ambient light sensor". Retrieved February 12, 2014. "Flameless candle
Flameless_candle
In heat transfer, moving heat sources is an engineering problem, particularly in welding. In the early 20th century, welding engineers began studying moving
Moving heat source model for thin plates
Moving_heat_source_model_for_thin_plates
Understanding of gas properties in terms of molecular motion
particles and heat was by the English philosopher Francis Bacon in 1620. "It must not be thought that heat generates motion, or motion heat (though in some
Kinetic_theory_of_gases
Nitrogen diffusion case-hardening process
Nitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface. These processes are most commonly
Nitriding
Optical Phenomenon
Upon: Diffuse Reflectance Materials & Coatings" (PDF). electrooptics.com. Retrieved 6 August 2025. Incropera and DeWitt, Fundamentals of Heat and Mass
Lambert's_cosine_law
How an organism receives and responds to painful stimuli
pepper or cayenne pepper), mechanical (e.g., cutting, crushing), or thermal (heat and cold) stimulation of sensory neurons called nociceptors produces a signal
Nociception
Motion characterized by chaotic changes in pressure and flow velocity
(such as pipes, ducts, precipitators, gas scrubbers, dynamic scraped surface heat exchangers, etc.) and machines (for instance, internal combustion engines
Turbulence
Temperature control system
near a desired setpoint. Thermostats are used in any device or system that heats or cools to a setpoint temperature. Examples include building heating, central
Thermostat
In the field of heat transfer, intensity of radiation I {\displaystyle I} is a measure of the distribution of radiant heat flux per unit area and solid
Intensity_(heat_transfer)
Laboratory technique in bacterial cell biology
virulence could be suppressed with heat-killing. However, when the nonvirulent rough strain was combined with the heat-killed smooth strain, the rough strain
Calcium chloride transformation
Calcium_chloride_transformation
turns to liquid from vapor form and then the liquid is removed. diffuser A diffuser is placed over ductwork, and it separates air with vanes going in
Glossary_of_HVAC_terms
Product used to mask odors
under the seat wafer air fresheners, scented candles, reed diffusers, potpourri, and heat release products. Air fresheners introduce fragrance into the
Air_freshener
time as a result of its thermal mass. A body with high thermal mass (high heat capacity and low conductivity) will have a large thermal lag. [citation needed]
Thermal_lag
Country in South Asia
1200 BCE, an archaic form of Sanskrit, an Indo-European language, had diffused into India from the northwest. Its hymns recorded the early dawnings of
India
Satisfaction with the thermal environment
The human body can be viewed as a heat engine where food is the input energy. The human body will release excess heat into the environment, so the body
Thermal_comfort
Thermal insulation in snow structures
The effect is primarily due to two factors–thermal insulation and body heat. An igloo is a type of shelter constructed with snow blocks and are often
Igloo_effect
Conduit used in heating, ventilation, and air conditioning
which means that the fabric can still burn, but will extinguish when the heat source is removed. Fabric ducts are not rated for use in ceilings or concealed
Duct_(flow)
Brand of analgesic heat rub
as the methyl salicylate serves to loosen and diffuse the gum base. Tiger Balm Heat Rub IcyHot Deep Heat Flexpower RUB A535 "Self-medicate or see a doctor
Bengay
Law of thermodynamics establishing the conservation of energy
heat and thermodynamic work. The law also defines the internal energy of a system, an extensive property for taking account of the balance of heat transfer
First_law_of_thermodynamics
Law of electrical current and voltage
a heat conduction (Fourier) problem with temperature (the driving "force") and flux of heat (the rate of flow of the driven "quantity", i.e. heat energy)
Ohm's_law
Steel in which the main interstitial alloying constituent is carbon
phase can exist. The steel is then quenched (heat drawn out) at a moderate to low rate allowing carbon to diffuse out of the austenite forming iron-carbide
Carbon_steel
HEAT DIFFUSER
HEAT DIFFUSER
Girl/Female
Indian, Marathi
Our Heart Beat
Surname or Lastname
English
English : topographic name for someone who lived on a heath (Middle English hethe, Old English hǣð) or a habitational name from any of the numerous places, for example in Bedfordshire, Derbyshire, Herefordshire, Shropshire, and West Yorkshire, named with this word. The same word also denoted heather, the characteristic plant of heathland areas. This surname has also been established in Dublin since the late 16th century.
Female
Egyptian
, the sister of the royal scribe User-hat.
Surname or Lastname
English (chiefly Lancashire)
English (chiefly Lancashire) : habitational name from Heap Bridge in Lancashire, or a topographic name for someone who lived by a hill or heap, from Old English hēap ‘heap’, ‘mound’, ‘hill’.
Female
Egyptian
, the daughter of Petemet and the lady Hemsuisi.
Surname or Lastname
English (chiefly Kent)
English (chiefly Kent) : from Middle English heved ‘head’, applied as a nickname for someone with some peculiarity or disproportion of the head, or a topographic name for someone who lived on a hill or at the head of a stream or valley. This surname has long been established in Ireland.
Female
Egyptian
, house above.
Boy/Male
Sikh
Love
Surname or Lastname
English (Devon)
English (Devon) : nickname from Middle English hext ‘tallest’, ‘highest’ (Old English hēhst, superlative of hēah ‘high’).
Surname or Lastname
English
English : variant spelling of Hart.
Female
Egyptian
, Gold of Heart.
Surname or Lastname
English (chiefly Nottinghamshire)
English (chiefly Nottinghamshire) : metonymic occupational name for a grower or seller of wheat, from Old English hwǣte ‘wheat’ (a derivative of hwīt ‘white’, because of its use in making white flour).
Surname or Lastname
English
English : metonymic occupational name for a herdsman in charge of cattle or a nickname for someone thought to resemble an ox or a cow, from Middle English neat ‘ox’, ‘cow’ (Old English nēat). The modern English adjective neat (via French from Latin nitidus ‘clean’, ‘shining’) does not occur before the 16th century, after the main period of surname formation.
Boy/Male
Christian & English(British/American/Australian)
From Heath or Moorland
Male
Egyptian
, ("heart"); an early Egyptian astronomer.
Boy/Male
Bengali, Hindu, Indian, Sanskrit
Heart Beat
Boy/Male
Hindu, Indian
Heart
Surname or Lastname
English (chiefly southwestern)
English (chiefly southwestern) : variant of Hale 1.
Girl/Female
Indian
Love
Male
English
English surname transferred to forename use, HEATH means "heath."
HEAT DIFFUSER
HEAT DIFFUSER
Boy/Male
Hindu, Indian, Punjabi, Sikh
One Absorbed in Righteousness
Girl/Female
Arabic, Muslim
Summit; Height
Boy/Male
Biblical
Thus it is, how is this.
Girl/Female
Muslim
Allah mercy
Girl/Female
Latin
Invoked to ward off enemies.
Boy/Male
Hindu, Indian, Marathi
Lord of the Night; Lord Shiva
Boy/Male
Egyptian
God saves.
Female
French
Pet form of French Georgine, GIGI means "earth-worker, farmer."Â
Girl/Female
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
Mother of Rama
Boy/Male
Indian, Sanskrit
Unbroken; Whole; Lord Shiva
HEAT DIFFUSER
HEAT DIFFUSER
HEAT DIFFUSER
HEAT DIFFUSER
HEAT DIFFUSER
imp. & p. p.
Heated; as, the iron though heat red-hot.
n.
The seat of the intellect; the brain; the understanding; the mental faculties; as, a good head, that is, a good mind; it never entered his head, it did not occur to him; of his own head, of his own thought or will.
v. t.
To make hot; to communicate heat to, or cause to grow warm; as, to heat an oven or furnace, an iron, or the like.
v. t.
To form a head to; to fit or furnish with a head; as, to head a nail.
n.
A headdress; a covering of the head; as, a laced head; a head of hair.
n.
Utmost violence; rage; vehemence; as, the heat of battle or party.
v. t.
To set on the head; as, to head a cask.
v. t.
To put a seat or bottom in; as, to seat a chair.
v. i.
To grow warm or hot by the action of fire or friction, etc., or the communication of heat; as, the iron or the water heats slowly.
n.
Wheat, or bread made from wheat.
p. p.
of Beat
v. i.
A cheat or swindler of the lowest grade; -- often emphasized by dead; as, a dead beat.
p. p.
of Hent
a.
Principal; chief; leading; first; as, the head master of a school; the head man of a tribe; a head chorister; a head cook.
n.
A recurring stroke; a throb; a pulsation; as, a beat of the heart; the beat of the pulse.
a.
Neat; feat.
n.
High temperature, as distinguished from low temperature, or cold; as, the heat of summer and the cold of winter; heat of the skin or body in fever, etc.
imp.
of Beat
v. i.
To grow warm or hot by fermentation, or the development of heat by chemical action; as, green hay heats in a mow, and manure in the dunghill.