what is a thermal gradient
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temperature gradient temperature gradient. At sea, a temperature gradient is the change of temperature with depth; a positive gradient is a temperature increase with an increase in depth, and a negative gradient is a temperature decrease with an increase in depth. Thesaurus AntonymsRelated WordsSynonymsLegend:
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How Is Thermal Energy Used? Thermal energy is the energy that comes from heat. When thermal energy is transferred, it is called heat. Heat is a temperature and is measured in degrees of Fahrenheit or Celsius. An object can contain thermal energy, but it cannot contain heat. Thermal energy most commonly comes from fossil fuels such as coal or gas. In addition, thermal energy can be generated by resources such as biomass, solar and geothermal. Biomass - this is a fuel generated from organic materials.
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- Definition of THERMAL STRESS. : stress in a body or structure due to inequalities of temperature. ADVERTISEMENT. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.
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Difference Between Sublimation and Heat Transfer Thermal energy also known as heat is a form of internal energy of a system. Thermal energy is the cause for the temperature of a system. The thermal energy occurs due to the random movements of the molecules of the system. Every system having a temperature above absolute zero has a positive thermal energy.
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Thermal-transfer printing Thermal transfer is preferred over direct thermal printing on surfaces that are heat-sensitive or when higher durability of printed matter (especially against heat) is desired. Thermal transfer is a popular print process particularly used for the printing of identification labels. It is the most widely used printing process in the world for the printing of high-quality barcodes.
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electrochemical gradient edge gradient in radiology, the penumbra or partial shadow on a radiograph caused by the three-dimensional shape of an object. electrochemical gradient the difference in ion concentration and electrical potential from one point to another, so that ions tend to move passively along it.ntestinal electrochemical gradient. electrical potential differences and ion concentration differences across the external membrane of the intestinal mucosa arising from the active transport of most electrolytes and some nonelectrolytes across the membrane.
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Outdoor Action Guide to Hypothermia And Cold Weather Injuries 1 Radiation-loss of heat to the environment due to the temperature gradient (this occurs only as long as the ambient temperature is below 98.6). 2  Factors important in radiant heat loss are the surface area and the temperature gradient. Radiation-loss of heat to the environment due to the temperature gradient (this occurs only as long as the ambient temperature is below 98.6). 2  Factors important in radiant heat loss are the surface area and the temperature gradient.
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thermal 2a : of, relating to, or caused by heat thermal stress thermal insulationb : being or involving a state of matter dependent upon temperature thermal conductivity thermal agitation of molecular structurec : having low energies of the order of those due to thermal agitation thermal neutrons.
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Natural convection Natural convection is a mechanism, or type of heat transport, in which the fluid motion is not generated by any external source (like a pump, fan, suction device, etc.) but only by density differences in the fluid occurring due to temperature gradients.
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Geothermal gradient A variation in surface temperature induced by climate changes and the Milankovitch cycle can penetrate below the Earth's surface and produce an oscillation in the geothermal gradient with periods varying from daily to tens of thousands of years and an amplitude which decreases with depth and having a scale depth of several kilometers.
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Toxic Substances Portal - Sulfur Dioxide When released into the environment, sulfur dioxide moves into the air. In the air, it can be converted to sulfuric acid, sulfur trioxide, and sulfates. Sulfur dioxide dissolves in water. Once dissolved in water, sulfur dioxide can form sulfurous acid.
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Isotherm The relative spacing of the isotherms indicates the temperature gradient, the amount by which the temperature values vary across each unit of horizontal distance, in a direction perpendicular to the isotherms. The gradient is larger where the isotherms are closer.
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The Gradient The Gradient. The gradient is a vector operation which operates on a scalar function to produce a vector whose magnitude is the maximum rate of change of the function at the point of the gradient and which is pointed in the direction of that maximum rate of change.In rectangular coordinates the gradient of function f(x,y,z) is:If S is a surface of constant value for the function f(x,y,z) then the gradient on the surface defines a vector which is normal to the surface. ApplicationsConduction heat transfer.n rectangular coordinates the gradient of function f(x,y,z) is: If S is a surface of constant value for the function f(x,y,z) then the gradient on the surface defines a vector which is normal to the surface. ApplicationsConduction heat transfer.
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Heat transfer Convective heat transfer, or convection, is the transfer of heat from one place to another by the movement of fluids, a process that is essentially the transfer of heat via mass transfer. Bulk motion of fluid enhances heat transfer in many physical situations, such as (for example) between a solid surface and the fluid.
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- The temperature gradient is obviously 1 degree per metre. If we take a unit vector pointing to the right i.e. $\vec{x} = (1)$ and multiply this by the temperature gradient we get +1 i.e. the temperature rises by 1K when moving 1m in the positive $x$ direction.
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- Geothermal gradient. Geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth's interior. Away from tectonic plate boundaries, it is about 25 °C per km of depth (1 °F per 70 feet of depth) near the surface in most of the world.
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Pressure Gradient Pressure Gradient. A gradient is a gradual change from one thing to something else. It is easy to understand this concept by considering the colors black and white. To create a gradient between them, we begin with the color black. Slowly the color changes across the picture from black to dark gray.
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PHYSICAL STATES OF MATTER Thermal Conductivity. Heat transfer by conduction involves transfer of energy within a material without any motion of the material as a whole. The rate of heat transfer depends upon the temperature gradient and the thermal conductivity of the material.Algebraic methods can be used for the calculation of conduction heat transfer across plane walls, but for most geometries the heat transfer must be expressed in terms of the thermal gradient.he rate of heat transfer depends upon the temperature gradient and the thermal conductivity of the material.
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Four Common Types of Rigid, Monolithic Concrete Retaining Walls They consist of a relatively thin stem and a base slab. The base is also divided into two parts, the heel and toe. The heel is the part of the base under the backfill. The toe is the other part of the base. Use much less concrete than monolithic gravity walls, but require more design and careful construction.
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Geothermal gradient The geothermal gradient varies with location and is typically measured by determining the bottom open-hole temperature after borehole drilling. To achieve accuracy the drilling fluid needs time to reach the ambient temperature. This is not always achievable for practical reasons.
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Heat transfer Thermal radiation is energy emitted by matter as electromagnetic waves, due to the pool of thermal energy in all matter with a temperature above absolute zero. Thermal radiation propagates without the presence of matter through the vacuum of space.onvective heat transfer, or convection, is the transfer of heat from one place to another by the movement of fluids, a process that is essentially the transfer of heat via mass transfer. Bulk motion of fluid enhances heat transfer in many physical situations, such as (for example) between a solid surface and the fluid.
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Geothermal gradient Heat production was twice that of present-day at approximately 3 billion years ago, resulting in larger temperature gradients within the Earth, larger rates of mantle convection and plate tectonics, allowing the production of igneous rocks such as komatiites that are not formed anymore today.
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Convective heat transfer Convective heat transfer, often referred to simply as convection, is the transfer of heat from one place to another by the movement of fluids. Convection is usually the dominant form of heat transfer in liquids and gases. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of conduction (heat diffusion) and advection (heat transfer by bulk fluid flow).
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gradient Medical Definition of gradient. 1  1: change in the value of a quantity (as temperature, pressure, or concentration) with change in a given variable and especially per unit on a linear scale. 2  2: a graded difference in physiological activity along an axis (as of the body or an embryonic field)
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Thermal hydrolysis Description [edit]. Thermal hydrolysis is a two-stage process combining high-pressure boiling of waste or sludge followed by a rapid decompression. This combined action sterilizes the sludge and makes it more biodegradable, which improves digestion performance.he city of Oslo, Norway installed a system for converting domestic food waste to fuel in 2012. A thermal hydrolysis system produces biogas from the food waste, which provides fuel for the city bus system and is also used for agricultural fertilizer.
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Permafrost Geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth 's interior. Away from tectonic plate boundaries, it is about 25 °C per km of depth (1 °F per 70 feet of depth) in most of the world.eothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth 's interior. Away from tectonic plate boundaries, it is about 25 °C per km of depth (1 °F per 70 feet of depth) in most of the world.