I tried setting up an inhomogeneous Dirichlet BC as follows:
std::set<boundary_id_type> bc_surface;
bc_surface.insert(BOUNDARY_ID1);
std::vector<unsigned int> u_only(1, u_var);
ConstFunction<Number> bc_value1(-1.0);
get_dof_map().add_dirichlet_boundary(DirichletBoundary
(bc_surface, u_only, &bc_value1));
, but I found u values are always zero no matter what constant values I
use. Could you suggest some tips to fix this problem, please?
Regards,
K. Lee.
On Tue, Jan 22, 2013 at 7:45 AM, Vikram Garg <[email protected]>wrote:
> The only other one I know of is examples/fem_system/fem_system_ex_1 The
> file naviersystem.C shows how to set Dirichlet boundary conditions.
>
> Thanks.
>
>
> On Mon, Jan 21, 2013 at 6:41 PM, Kyunghoon Lee <[email protected]
> > wrote:
>
>> Thank you for the reply. I wonder if there are other examples about
>> Dirichlet boundary conditions since I'm not familiar with them. Can you
>> suggest some, please?
>>
>> Regards,
>> K. Lee.
>>
>> On Mon, Jan 21, 2013 at 10:44 PM, Vikram Garg <[email protected]
>> >wrote:
>>
>> > Hey Kyunghon,
>> > Please see adjoints example 3
>> > (examples/adjoints/adjoints_ex3/). There we solve a Stokes +
>> > Convection-Diffusion system in an H-shaped channel. The file
>> adjoints_ex3.C
>> > contains a description of the type of boundary conditions we are
>> setting at
>> > the different boundary ids, and the file coupled_system.C actually sets
>> > these boundary conditions using the Dirichlet boundary system.
>> >
>> > Regards.
>> >
>> > On Sun, Jan 20, 2013 at 9:28 PM, Kyunghoon Lee <
>> [email protected]
>> > > wrote:
>> >
>> >> Hello all,
>> >>
>> >> I have a question about dealing with inhomogeneous Dirichlet boundary
>> >> conditions. I have a simple 2D steady state heat conduction model
>> with a
>> >> rectangular domain. I'd like to apply heat flux on the left side (mesh
>> >> boundary id = 1), and set an inhomogeneous Dirichlet boundary
>> condition on
>> >> the rest of slides (mesh boundary id = 2). Among the examples,
>> >> introduction_ex3 shows how to deal with Dirichlet boundary conditions,
>> but
>> >> it doesn't show how to apply Dirichlet boundary conditions on a
>> specific
>> >> mesh ID. I'd appreciate if someone could show me how to do with
>> Libmesh.
>> >>
>> >> K. Lee.
>> >>
>> >>
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>> >
>> >
>> >
>> > --
>> > Vikram Garg
>> > Postdoctoral Associate
>> > Center for Computational Engineering
>> > Massachusetts Institute of Technology
>> >
>> > http://www.runforindia.org/runners/vikramg
>> >
>>
>> ------------------------------------------------------------------------------
>> Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
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>
>
>
> --
> Vikram Garg
> Postdoctoral Associate
> Center for Computational Engineering
> Massachusetts Institute of Technology
>
> http://www.runforindia.org/runners/vikramg
>
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