[firedrake] Solve a Variational problem in a part of the domain

[Anna Kalogirou]

Hi all,

I have to solve a problem with the bilinear form similar to the following:

a = ( v*u + dt*inner(grad(u),grad(v)) )*dx + ( v*dt*assemble(u*dx) )*dx

The last term is essentially the product of the integral of u and the 
integral of test function v.
Is it even possible to solve this in Firedrake?

Best,

Anna.

On 14/08/15 15:43, Lawrence Mitchell wrote:
>> On 14 Aug 2015, at 11:55, Anna Kalogirou <a.kalogirou at leeds.ac.uk> wrote:
>>
>> Hi,
>>
>> I was planning to define the heavyside function as a DG0 function.
>>
>> Any ideas about solving equation (1b), which contains a time-update for both a function and a scalar?
> I haven't been fully following along, but it looks like the formulation in (1f) introduces, effectively, a global coupling.  Is that right?  Assuming you didn't have any implementation constraints, how would you go about solving this?
>
> Lawrence
>
>
> _______________________________________________
> firedrake mailing list
> firedrake at imperial.ac.uk
> https://mailman.ic.ac.uk/mailman/listinfo/firedrake

-- 
  
  Dr Anna Kalogirou
  Research Fellow
  School of Mathematics
  University of Leeds

  http://www1.maths.leeds.ac.uk/~matak/

-------------- next part --------------
HTML attachment scrubbed and removed