You have to make sure you call heterogenously_constrain_element_matrix_and_vector (instead of constrain_element_matrix_and_vector) as in introduction_ex4.
David On 01/21/2013 07:56 PM, Kyunghoon Lee wrote: > 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. >>>>> >>>>> >>> ------------------------------------------------------------------------------ >>>>> Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, >>>>> MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current >>>>> with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft >>>>> MVPs and experts. SALE $99.99 this month only -- learn more at: >>>>> http://p.sf.net/sfu/learnmore_122412 >>>>> _______________________________________________ >>>>> Libmesh-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/libmesh-users >>>>> >>>> >>>> >>>> -- >>>> 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, >>> MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current >>> with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft >>> MVPs and experts. SALE $99.99 this month only -- learn more at: >>> http://p.sf.net/sfu/learnmore_122412 >>> _______________________________________________ >>> Libmesh-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/libmesh-users >>> >> >> >> -- >> Vikram Garg >> Postdoctoral Associate >> Center for Computational Engineering >> Massachusetts Institute of Technology >> >> http://www.runforindia.org/runners/vikramg >> > ------------------------------------------------------------------------------ > Master SQL Server Development, Administration, T-SQL, SSAS, SSIS, SSRS > and more. 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