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THERMAL DIFFUSIVITY
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 is usually
denoted by α
The formula is:
α = k/(c x rho )
where
k is thermal conductivity (W/(m·K))
rho is density (kg/m³)
c is specific heat capacity (J/(kg·K))

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Thermal diffusivity expression with various parameters

  • 1. 17 THERMAL DIFFUSIVITY 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 is usually denoted by α The formula is: α = k/(c x rho ) where k is thermal conductivity (W/(m·K)) rho is density (kg/m³) c is specific heat capacity (J/(kg·K))