Fick's first law of diffusion

E369670

Fick's first law of diffusion is a fundamental physical law that relates the diffusive flux of particles to the spatial gradient of their concentration, describing how substances move from regions of high to low concentration.

All labels observed (4)

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Statements (46)

Predicate Object
instanceOf constitutive relation
law of diffusion
physical law
appliesTo diffusion in fluids
diffusion in solids
mass transport by diffusion
assumes no accumulation of diffusing species
steady state diffusion
describes diffusive flux
dimensionOfDiffusionCoefficient area per unit time
dimensionOfFlux amount per unit area per unit time
drivingForce concentration gradient
expresses linear phenomenological relation between flux and driving force
field biophysics
chemical engineering
materials science
physical chemistry
statistical mechanics
thermodynamics
transport phenomena
hasQuantity concentration gradient
diffusion coefficient
diffusive flux
historicalYear 1855
implies transport from high concentration to low concentration
introducedBy Adolf Fick
surface form: Adolf Eugen Fick
mathematicalForm J = -D ∂C/∂x
namedAfter Adolf Fick
relatedTo Fick's first law of diffusion self-linksurface differs
surface form: Fick's laws of diffusion

Fick's first law of diffusion self-linksurface differs
surface form: Fick's second law of diffusion

Fick's first law of diffusion self-linksurface differs
surface form: Fickian diffusion
relates diffusive flux to concentration gradient
signConvention negative sign indicates flux opposite to concentration gradient
states the diffusive flux is proportional to the negative gradient of concentration
usedIn corrosion science
drug delivery modeling
geological transport modeling
mass transfer calculations
modeling diffusion in membranes
semiconductor processing
usesSymbol C for concentration
D for diffusion coefficient
J for diffusive flux
x for spatial coordinate
validWhen diffusion coefficient is constant in space
system is isothermal

How these facts were elicited

Referenced by (5)

Full triples — surface form annotated when it differs from this entity's canonical label.

Fourier's law of heat conduction analogousTo Fick's first law of diffusion
Cottrell equation relatedTo Fick's first law of diffusion
this entity surface form: Fick's second law of diffusion
Fick's first law of diffusion relatedTo Fick's first law of diffusion self-linksurface differs
this entity surface form: Fick's second law of diffusion
Fick's first law of diffusion relatedTo Fick's first law of diffusion self-linksurface differs
this entity surface form: Fick's laws of diffusion
Fick's first law of diffusion relatedTo Fick's first law of diffusion self-linksurface differs
this entity surface form: Fickian diffusion