diffusivity
Noun
Meaning
Tendency to become diffused; tendency, as of heat, to become equalized by spreading through a conducting medium.
Source: Webster's dictionarySynonyms
Examples
Adding oxygen to the CeO 2 system, for example, will increase the diffusivity of the oxygen allowing for more efficient solid oxide fuel cells.
Extensions ; Resistive : Resistive MHD describes magnetized fluids with finite electron diffusivity ( ).
Below a depth of about 1000 m, carbon dioxide is injected as a supercritical fluid, a material with the density of a liquid, but the viscosity and diffusivity of a gas.
Conversely, a low diffusivity leads to slower cooling and a larger HAZ.
However, for engine oil, convection is very effective in transferring energy from an area in comparison to pure conduction, so momentum diffusivity is dominant.
In a sense, thermal diffusivity is the measure of thermal inertia. citation In a substance with high thermal diffusivity, heat moves rapidly through it because the substance conducts heat quickly relative to its volumetric heat capacity or 'thermal bulk'.