- thermal (heat) diffusivity
- Смотри Температуропроводность.
Энциклопедический словарь по металлургии. — М.: Интермет Инжиниринг. Главный редактор Н.П. Лякишев. 2000.
thermal (heat) diffusivity
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Heat transfer — is a discipline of thermal engineering that concerns the exchange of thermal energy from one physical system to another. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation, and phase change … Wikipedia
Thermal diffusivity — In heat transfer analysis, thermal diffusivity (symbol: alpha,, but note that the symbols kappa, D, and k are all commonly used) is the ratio of thermal conductivity to volumetric heat capacity. It has SI of m²/s.:alpha = {k over { ho c pwhere: * … Wikipedia
Thermal conductivity — In physics, thermal conductivity, k, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier s Law for heat conduction.First, we define heat conduction by the formula::: H=frac{Delta Q}{Delta t}=k … Wikipedia
thermal diffusivity — a material property that describes the rate at which heat diffuses through a body. It is a function of the body s thermal conductivity and its specific heat. A high thermal conductivity will increase the body s thermal diffusivity, as heat will… … Mechanics glossary
Heat-affected zone — The heat affected zone (HAZ) is the area of base material, either a metal or a thermoplastic, which has had its microstructure and properties altered by welding or heat intensive cutting operations. The heat from the welding process and… … Wikipedia
Thermal effusivity — In Thermodynamics, the thermal effusivity of a material is defined as the square root of the product of the material s thermal conductivity and its volumetric heat capacity. [http://www.evitherm.org/default.asp?ID=277] :e = {(k ho c p)}^{1/2}Here … Wikipedia
Thermal conductivity measurement — Two classes of methods exist to measure the thermal conductivity of a sample: steady state and non steady state methods. Steady state methods (In Geology/Geophysics)The most common method for consolidated rock samples is the Divided Bar. There… … Wikipedia
Soil thermal properties — The thermal properties of soil are a component of soil physics that has found important uses in engineering, climatology and agriculture. These properties influence how energy is partitioned in the soil profile. While related to soil temperature … Wikipedia
Температуропроводность — [thermal (heat) diffusivity] физическая величина, характеризующая теплопроводность, отнесенную к теплоемкости единицы массы. Если теплоемкость складывается аддитивно из теплоемкостей компонентов, что справедливо для идеальных газовых смесей, то… … Энциклопедический словарь по металлургии
ТЕМПЕРАТУРОПРОВОДНОСТЬ — [thermal (heat) diffusivity] физическая величина, характеризующая теплопроводность, отнесенную к теплоемкости единицы массы. Если теплоемкость складывается аддитивно из теплоемкостей компонентов, что справедливо для идеальных газовых смесей, в… … Металлургический словарь
