May be it would be better to edit my question and remove the "cylinder"
part, but I do not have access to modify the question.
Please consider my question for a general case of a geometry with multiple
boundary indicators and different BCs on them.
Thanks.
Elena
On Tuesday, May 16, 2017 at 1:10:53 PM UTC+2, Elena Greco wrote:
>
> Dear Uwe
>
> Thanks for you prompt reply.
>
> But if I import a mesh from gmesh and for a not regular geometry I would
> face a problem.
> Do you have any suggestion for this case?
>
> Thanks.
> Elena
>
> On Tuesday, May 16, 2017 at 12:50:36 PM UTC+2, Elena Greco wrote:
>>
>> Hello,
>>
>> In Steps 13 and 14, for primal problem, the boundary condition is
>> calculate based on an analytical solution, therefore it is easy to set
>> different boundary indicators and apply the BC on different boundary
>> indicators.
>>
>> In my problem I have a cylinder (boundary indicator of R_in is 0 and
>> boundary indicator of R_out is 1).
>> How can I implement two different BC on these BCs?
>> for example on R_in the displacement U_x = x + y and on R_out
>> displacement U_x = x^2 + y.
>>
>> I don't want to destroy the extensibility of the code, therefore I would
>> like to modify template <int dim> double
>> CurvedRidges<dim>::BoundaryValues::value (const Point<dim> &p, const
>> unsigned int /*component*/) const {...} part NOT the
>> Solver<dim>::assemble_linear_system part.
>>
>> I was thinking of passing boundary indicator to the boundary function or
>> something similar; like:
>>
>> VectorTools::interpolate_boundary_values (dof_handler,
>> 0,
>> **boundary_values(0),*
>> boundary_value_map);
>>
>> and then relate the BC in CurvedRidges<dim>::BoundaryValues::value(...) to
>> boundary indicator, but I am not sure if it is possible and which parts
>> should I modify.
>>
>> Thanks
>> Elena
>>
>
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