Thermal diffusivity Guide, Meaning , Facts, Information and Description
In heat transfer analysis, thermal diffusivity (symbol: ) is the ratio of thermal conductivity to heat capacity.
k is thermal conductivity, measured in watts per metre-kelvin
ρcp is the volumetric heat capacity, measured in joules per cubic metre-kelvin
The SI units are square metres per second or mē/s.
Substances with high thermal diffusivity rapidly adjust their temperature to that of their surroundings, because they conduct heat quickly in comparison to their thermal 'bulk'.
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