I am solving the diffusion equation $$ \frac{\partial \rho}{\partial t}=D\frac{\partial^2 \rho}{\partial x^2} $$ on an infinite line with initial condition that the particle density $\rho(t=0.1,x)$ is a normal distribution. For a no flux boundary condition I get an error in Matlab. Is it not possible to have no flux in this case as there are "no ends to insulate"?
2026-04-07 16:12:41.1775578361
Diffusion on infinite line with no flux
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