Fick's Law of Diffusion

Introduction to Fick's Law of Diffusion

Fick's law of diffusion describes the process of diffusion through a stationary medium, such as a fluid or a solid matrix. The formula represents the steady state one-dimensional diffusion of a solute in a medium. It calculates the flux of the solute across a unit area per unit time. In this formula, J represents the flux, D is the diffusion coefficient, A is the surface area through which diffusion is taking place, L is the distance over which diffusion is occurring, and dC/dx is the concentration gradient.

Parameter usage:

• diffusionCoefficient = diffusion coefficient of the solute in the medium
• surfaceArea = surface area through which diffusion is taking place
• concentrationGradient = concentration gradient across the distance of diffusion

Output:

• flux = flux of the solute across the area

Data validation

The diffusion coefficient, surface area, and concentration gradient should be greater than zero.

Summary

This calculator allows for the determination of the flux of solute across a unit area per unit time in a medium due to diffusion.