Molar flux of a species is proportional to the negative gradient of concentration: J = −D ∇c, where D is the diffusion coefficient (m²·s⁻¹). The prototypical linear irreversible transport law for mass.
Fick's first law of diffusion
Related concepts
- Continuity equation
- Partial differential equation (PDE)
- Ohm's law
- Ohm's law
- Fourier's law of heat conduction
- Fourier's law of heat conduction
- Onsager reciprocal relations
- Onsager reciprocal relations
- Diffusion equation
- Diffusion equation
- Rotating disc electrode (RDE)
- Polarography (Heyrovsky 1922)
- Clark electrode (1956)
- SECM (Bard 1989)