Fickian diffusion

Fickian diffusion describes how particles like gases or molecules spread from an area of high concentration to an area of low concentration over time. Imagine a drop of ink dispersing in water: the ink particles move randomly, gradually filling the entire volume evenly. This process is driven by concentration differences, with the rate of diffusion depending on factors such as the concentration gradient, temperature, and the properties of the medium. It follows Fick’s laws, which mathematically describe how spread occurs, helping scientists predict how substances distribute in environments like biological tissues, materials, or fluids.