Thermal diffusivity

Common card · No. 277635

In thermodynamics, thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. It is a measure of the rate of heat transfer inside a material and has SI units of m2/s. It is an intensive property. Thermal diffusivity is usually denoted by lowercase alpha (α), but a, h, κ (kappa), K, D, D T {\displaystyle D_{T}} are also used. The formula is α = k ρ c p , {\displaystyle \alpha ={\frac {k}{\rho c_{p}}},} where k is thermal conductivity (W/(m·K)), cp is specific heat capacity (J/(kg·K)), ρ is density (kg/m3). Together, ρcp can be considered the volumetric heat capacity (J/(m3·K)). Thermal diffusivity...

Read on Wikipedia