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How to solve Reaction-Diffusion equation with Dirac Delta function using PointSource

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Hi! I'm trying to solve this simple equation:
ut = ∆u+u
u(x, 0) = δ(x),
u(0, t) = 1, boundary condition
The euqation is time-dependent. The initial condition is the delta function, and the boundary condition is a constant(1), I've been trying to solve using different ways but with no success.Actually, i'm really new in Fenics. I don't know how to apply he PointSource. If someone could help me, I will be greateful. Many thanks!

asked Nov 26, 2015 by sustand FEniCS Novice (120 points)

1 Answer

0 votes
answered Nov 27, 2015 by hernan_mella FEniCS Expert (19,460 points)
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