random walk fick diffusion

Random walk refers to a mathematical model that describes the movement of particles or molecules in a random or unpredictable manner. It is a type of stochastic process, where the movement of the particle is determined by a random variable at each step.

Fick's law of diffusion is a mathematical equation that describes how particles or molecules move through a medium. It states that the rate of diffusion is proportional to the concentration gradient, which is the difference in concentration between two points in a medium.

Diffusion is the movement of particles or molecules from an area of high concentration to an area of low concentration. It occurs due to the random motion of particles, and it is driven by the concentration gradient. Diffusion is an important process in many biological and physical systems, such as the movement of gases in the atmosphere, the transport of nutrients in cells, and the spread of diseases.