On 1/6/21 9:12 AM, Karthi wrote:
Question (1) Should I use VectorTools::project or VectorTools::interpolate for
initializing the variables?
In practice, it does not matter very much, but interpolate() is much cheaper
than project().
Both the initial conditions are not giving the desired steady state solution
(possibly there is a bug that is not related with the initial condition).
However, I want to make sure I understand how to set up initial condition
generated using random values.
Have you tried to figure out *how specifically* it is wrong?
Question (2)Though, I set the initial condition only to one of the three
solution variables, in the output I see all three variables initialized (with
values different from zero) at time zero. I copied ‘output’ from tutorial
step-21. Maybe the output is not generated at time zero or I made a mistake in
the set up InitialValues?
I don't have access to your code, so I can't tell. The implementation of your
vector_value() function looks correct to me. If you don't know which time step
the function is called, then it's probably worth just running a single time
step and looking at the output after that step.
Question (3)Since, I have a system of three variables (each with FE_Q<dim>(1)
finite element space) in my function InitialValues I only defined
InitialValues::vector_value and not InitialValues::value. Did I do right?
I think so. You would have gotten an error message (assuming you are working
in debug mode) if you had done that wrong.
Best
W.
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Wolfgang Bangerth email: [email protected]
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