Neumann boundary condition in a first order PDE
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I'm trying to solve the following equation using PDEPE:
dC/dt + v * dC/dx = constant
With the boundary conditions:
C(t,0)=Cin dC(t,L)/dx=0
My question is how can I incorporate the second BC in the PDEPE syntax, if I should define f = [-v]. Is there any posibility to call the penultime value and make it equal to ur, so dC/dx=0? u(x_n) = u(x_(n-1))
Thanks for your cooperation!
Antonio
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