Diffusion in One Dimension

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The equation for unsteady-state diffusion is , where is the distance and is the solute concentration. This Demonstration plots the time-evolution of the concentration profile in the solute, for varying coefficient of diffusion and concentration amplitude. The diffusion function is determined as a function of the distance , the diffusion coefficient , and time .

Contributed by: Olexandr Eugene Prokopchenko (March 2011)
Open content licensed under CC BY-NC-SA



The function is a function of position and time; you can regulate the diffusion coefficient and concentration amplitude . The range of is the interval from -0.4 to 0.4 (relative units on the horizontal axis).

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