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- Thermal_diffusivity abstract "In heat transfer analysis, thermal diffusivity (usually denoted α but a, κ, [citation needed], and D are also used) is the thermal conductivity divided by density and specific heat capacity at constant pressure. It measures the ability of a material to conduct thermal energy relative to its ability to store thermal energy. It has the SI unit of m²/s. The formula is:where is thermal conductivity (W/(m·K)) is density (kg/m³) is specific heat capacity (J/(kg·K))Together, can be considered the volumetric heat capacity (J/(m³·K)).As seen in the heat equation,,thermal diffusivity is the ratio of the time derivative of temperature to its curvature, quantifying the rate at which temperature concavity is "smoothed out". In a sense, thermal diffusivity is the measure of thermal inertia. In a substance with high thermal diffusivity, heat moves rapidly through it because the substance conducts heat quickly relative to its volumetric heat capacity or 'thermal bulk'.Thermal diffusivity is often measured with the flash method. It involves heating a strip or cylindrical sample with a short energy pulse at one end and analyzing the temperature change (reduction in amplitude and phase shift of the pulse) a short distance away.".
- Thermal_diffusivity wikiPageID "58282".
- Thermal_diffusivity wikiPageRevisionID "605018123".
- Thermal_diffusivity hasPhotoCollection Thermal_diffusivity.
- Thermal_diffusivity subject Category:Heat_conduction.
- Thermal_diffusivity subject Category:Heat_transfer.
- Thermal_diffusivity subject Category:Physical_quantities.
- Thermal_diffusivity type Abstraction100002137.
- Thermal_diffusivity type Measure100033615.
- Thermal_diffusivity type PhysicalQuantities.
- Thermal_diffusivity comment "In heat transfer analysis, thermal diffusivity (usually denoted α but a, κ, [citation needed], and D are also used) is the thermal conductivity divided by density and specific heat capacity at constant pressure. It measures the ability of a material to conduct thermal energy relative to its ability to store thermal energy. It has the SI unit of m²/s.".
- Thermal_diffusivity label "Diffusività termica".
- Thermal_diffusivity label "Diffusivité thermique".
- Thermal_diffusivity label "Difusividad térmica".
- Thermal_diffusivity label "Difusividade térmica".
- Thermal_diffusivity label "Temperaturleitfähigkeit".
- Thermal_diffusivity label "Temperatuurvereffeningscoëfficiënt".
- Thermal_diffusivity label "Thermal diffusivity".
- Thermal_diffusivity label "Współczynnik wyrównania temperatur".
- Thermal_diffusivity label "انتشار حراري".
- Thermal_diffusivity label "温度拡散率".
- Thermal_diffusivity label "热扩散率".
- Thermal_diffusivity sameAs Temperaturleitfähigkeit.
- Thermal_diffusivity sameAs Difusividad_térmica.
- Thermal_diffusivity sameAs Diffusivité_thermique.
- Thermal_diffusivity sameAs Difusivitas_termal.
- Thermal_diffusivity sameAs Diffusività_termica.
- Thermal_diffusivity sameAs 温度拡散率.
- Thermal_diffusivity sameAs Temperatuurvereffeningscoëfficiënt.
- Thermal_diffusivity sameAs Współczynnik_wyrównania_temperatur.
- Thermal_diffusivity sameAs Difusividade_térmica.
- Thermal_diffusivity sameAs m.0fz2k.
- Thermal_diffusivity sameAs Q3381809.
- Thermal_diffusivity sameAs Q3381809.
- Thermal_diffusivity sameAs Thermal_diffusivity.
- Thermal_diffusivity wasDerivedFrom Thermal_diffusivity?oldid=605018123.
- Thermal_diffusivity isPrimaryTopicOf Thermal_diffusivity.