Thank you Prof. Bangerth.
I am always greatfull for your input.
On Friday, March 10, 2023 at 10:27:49 PM UTC+1 Wolfgang Bangerth wrote:
> On 3/8/23 07:49, Abbas wrote:
> >
> > I am solving a nonlinear problem with DG and my BCs are in the weak
> form. It
> > would be helpful if I start with a
On 3/8/23 07:49, Abbas wrote:
I am solving a nonlinear problem with DG and my BCs are in the weak form. It
would be helpful if I start with a solution vector that is closer to the
prescribed solution so I won't have to do iterations otherwise would have been
unnecessary.
For a purely linear p
I would still want to initialise my solution vector to the values which are
prescribed at the boundary before solving.
Context:
I am solving a nonlinear problem with DG and my BCs are in the weak form.
It would be helpful if I start with a solution vector that is closer to the
prescribed sol
It's cool how dealii is consitent with the maths.
Maybe @Wolfgang would agree that this should have thrown an exception in Debug?
In principle yes, but I don't know how to write such an assertion given the
generality of the function (for the hp and non-hp case, and when selecting
only a sub
Thank you Daniel.
I was using penalties before taking this route, because I had artifacts at
the boundary faces present at a corner between a Dirichlet and a Neuman BC
edge. A problem I didn't have with CG. My first intuition was to apply BCs
strongly to fix this, but I don't think it will ev
Abbas,
Yes, FE_DGQ only defines dofs in the interior of cells. Thus, trying to
interpolate the boundary has no effect. You would normally use penalty
terms to prescribe boundary values for DG methods.
Best,
Daniel
On Wed, Jan 4, 2023 at 6:04 PM Abbas wrote:
> Hello,
>
> The VectorTools::interp
Hello,
The VectorTools::interpolate_boundary_values function works for
interpolating fe_Q functions but not fe_DGQ .
Was this meant to be the case?
I attached a minimal code that illustrates this.
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