diffusion limit

The diffusion limit refers to the maximum rate at which substances can spread or mix through a medium, often influenced by factors like concentration gradients and temperature. In a physical or chemical context, it describes how quickly molecules (like gases or liquids) can move and interact with each other. When a system reaches its diffusion limit, further mixing or movement slows down significantly, making it harder for reactions or processes to occur efficiently. This concept is important in fields like biology, chemistry, and materials science, where understanding how substances diffuse impacts everything from drug delivery to environmental science.