Diffusion coefficient (Mass diffusivity) for liquids


Diffusivity or diffusion coefficient is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species (or the driving force for diffusion). There is an approximate dependence of the diffusion coefficient on temperature in liquids.

Related formulas


D1Diffusion coefficient 1 (m2/s)
D2Diffusion coefficient 2 (m2/s)
T1Absolute temperature 1 (K)
μ2The dynamic viscosity of the solvent 2 (Pa*s)
T2Absolute temperature 2 (K)
μ1The dynamic viscosity of the solvent 1 (Pa*s)