Thermal diffusivity
From Glossary of Meteorology
thermal diffusivity
(
Also called heat conductivity, thermometric conductivity.) The ratio of the thermal conductivity k of a substance to the product of its specific heat c and its density ρ:
Also called heat conductivity, thermometric conductivity.) The ratio of the thermal conductivity k of a substance to the product of its specific heat c and its density ρ:
For a gas, c is the specific heat at constant pressure, cp. The thermal diffusivity determines the rate of heating given the temperature distribution according to an equation, which for one spatial dimension is At a temperature of 0°C, the thermal diffusivity for air is 1.9 x 10−5 m2 s−1. At other temperatures, the ratio μ/K is nearly constant, where μ is the dynamic viscosity.
See also diffusivity, kinematic viscosity.
See also diffusivity, kinematic viscosity.
List, R. J. 1951. Smithsonian Meteorological Tables. 6th rev. ed., . 394–395.
