Question #139887 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/139887
Status: Answered => Open
Sungick Kim is still having a problem:
Initially, I wanted to change the actual boundary domain.
After checking your answer out,
I think that changing the value of Dirichlet boundary condition for a fixed
boundary would be correct.
So I tried this code below. However, the value is not changing.
Could you give me a hand again?
--------------------------------------------------------------------------------------------
boundary = compile_subdomains("on_boundary")
# approximated step function whose value is 1 for x[0] < t
g = Expression("0.0 + 1.0/(1+exp(10*(x[0]-t)))")
BC = DirichletBC(Q1, g1, boundary)
# Parameters for time stepping
T = 10.0
dt = 0.1
t = 0.0
while t < T:
t += dt
# solve problem
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