Solving simple PDE Error

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Adam am 3 Jul. 2012

I'm trying to solve a transient diffusion equation:

dC/dt=D*d/dx(dC/dx)

Initial condition: C=0 x>0

Boundary conditions: C=0.3 at x=0 dC/dx=0 at x=1

Is it possible to use pdepe to solve? I keep getting error: "This DAE appears to be of index greater than 1."

Tom am 3 Jul. 2012

Can you post your boundary function?

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