Karthik R
Administrator

Hello,


What do you expect from the simulation? If I understand your problem right, diffusion is occurring in your model where species from higher concentration to that at lower. Think about it as if you had a higher temperature at the outer wall and lower on the inside. After some time, the entire ring would be at the same temperature. A similar phenomenon occurs in your model and therefore, you are getting a uniform concentration after some time.


Does that explanation help?


Best,


Karthik