Diffusivity (or Diffusion Coefficient) is the measure of capability of a substance or energy to be diffused or to allow something to pass by diffusion. There are: Thermal diffusivity (a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature (mm2/s)); Mass diffusivity (a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species); Eddy diffusivity (the exchange coefficient for the diffusion of a conservative property by eddies in a turbulent flow); Magnetic diffusivity (a parameter in plasma physics which appears in the magnetic.
Related Definitions in the Project: The Property and Unit
