Hydrodynamic approximation for distinct diffusion coefficients

Journal Article · Wed Jan 01 04:00:00 EST 1986 · J. Solution Chem.; (United States)

DOI:https://doi.org/10.1007/BF00646311· OSTI ID:7194635

Friedman, H L; Mills, R

The distinct diffusion coefficient is a measure of the coupling of the diffusive motions of two particles. It is given as the integral over a velocity cross correlation rather than the velocity self correlation that determines the self-diffusion coefficient. A hydrodynamic approximation for the distinct diffusion coefficient is proposed and then tested by comparison with data for a wide range of non-ionic binary mixtures. The hydrodynamic approximation gives negative distinct diffusion coefficients and is in qualitative agreement with most of the data. In many cases, deviations from the model results can be explained in terms of interactions which are not accurately treated by the model.

• Research Organization: SUNY, Stony Brook, NY
• OSTI ID: 7194635
• Journal Information: J. Solution Chem.; (United States), Journal Name: J. Solution Chem.; (United States) Vol. 15:1; ISSN JSLCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACETONE
ALCOHOLS
ALKANES
AROMATICS
BENZENE
BINARY MIXTURES
CARBON TETRACHLORIDE
CHLORINATED ALIPHATIC HYDROCARBONS
CYCLOALKANES
DIFFUSION
DISPERSIONS
DISTANCE
EINSTEIN FIELD EQUATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EQUATIONS
ETHANOL
FIELD EQUATIONS
FLUID MECHANICS
HALOGENATED ALIPHATIC HYDROCARBONS
HEPTANE
HEXANE
HYDROCARBONS
HYDRODYNAMICS
HYDROXY COMPOUNDS
INTERACTION RANGE
ION PAIRS
IONIC CONDUCTIVITY
KETONES
MATHEMATICAL MODELS
MECHANICS
METHANOL
MIXTURES
MOMENTUM TRANSFER
ONSAGER RELATIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SOLVENTS
PARTICLE MODELS
PHYSICAL PROPERTIES
SOLVENTS
VAN HOVE THEORY