Hi, It seems that you are using HIERARCHIC basis functions with interior/side dofs decomposition. These basis are in general good for L^2 and C^0 spaces but might not be well suited for DPG. I just guessing here, I'm not an expert of these kind of stabilized discretizations. Why don't you simply switch to L^2 orthonormal HIERARCHIC basis without interior/side dofs decomposition. With this latter choice you can't impose C^0 continuity but you don't have modes with homogeneous traces. Lorenzo
On Oct 21, 2011, at 12:30 AM, Roy Stogner wrote: > > At first glance I don't think there's a good way to avoid defining a > new element to give us side-only (not edge-only in 3D, right?) bases; > but I'm Cc'ing to libmesh-devel in case someone has an idea I've > missed. > --- > Roy > > ---------- Forwarded message ---------- > Date: Thu, 20 Oct 2011 17:19:42 -0500 > From: Truman Ellis <[email protected]> > To: Roy Stogner <[email protected]> > Subject: Trace Elements > > Roy, > I've got some degree of success with Convection-Diffusion with DPG, at least > for first order. I am having an issue when it comes to second or > higher order representations of the variables, namely the trace variables. > These are technically only defined on element edges, so any bubbles in > the basis never get constrained. It seems like I should define a new > TRACE_HIERARCHIC element where I just remove any bubbles, but I'm not sure if > this is the most natural solution. Perhaps libMesh has some better way of > implementing this like somehow prescribing edge based elements? > > What do you think? > > -- > Truman Ellis > > > ------------------------------------------------------------------------------ > The demand for IT networking professionals continues to grow, and the > demand for specialized networking skills is growing even more rapidly. > Take a complimentary Learning@Cisco Self-Assessment and learn > about Cisco certifications, training, and career opportunities. > http://p.sf.net/sfu/cisco-dev2dev > _______________________________________________ > Libmesh-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-devel ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Libmesh-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-devel
