In general, it's best to give up on ideas like "tri-diagonal matrices" when using a general, multi-dimensional, mesh-adaptive finite-element code. The set of problems that could actually generate tri-diagonal matrices is incredibly small.
Don't worry about the matrix and just use a good solver like GMRES. Derek On Fri, Jul 1, 2016 at 2:44 PM Harshad Sahasrabudhe <[email protected]> wrote: > Thanks! I don't necessarily want to place each partition on a processor. > The idea is to renumber the DOF indices such that the matrix looks like a > block tri-diagonal matrix. I am limited to first order Lagrange elements > and probably a trapezoidal integration rule. > > If I call renumber_nodes_and_elements after using LinearPartitioner, will > the resulting DOFs make a block tri-diagonal matrix? > > Harshad > > On Fri, Jul 1, 2016 at 2:38 PM, Derek Gaston <[email protected]> wrote: > >> Renumbering and Partitioning are two different things. >> >> You can partition along an axis using: >> https://github.com/libMesh/libmesh/blob/master/include/partitioning/linear_partitioner.h >> >> Derek >> >> On Fri, Jul 1, 2016 at 2:26 PM Harshad Sahasrabudhe <[email protected]> >> wrote: >> >>> Hi, >>> >>> Is it possible to partition a 3D mesh along x axis using the ParMetis >>> wrapper in LibMesh? I want to renumber the nodes and elements such that >>> the >>> numbering is ordered from minimum x to maximum x. >>> >>> Thanks! >>> Harshad >>> >>> ------------------------------------------------------------------------------ >>> Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San >>> Francisco, CA to explore cutting-edge tech and listen to tech luminaries >>> present their vision of the future. This family event has something for >>> everyone, including kids. Get more information and register today. >>> http://sdm.link/attshape >>> _______________________________________________ >>> Libmesh-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/libmesh-users >>> >> > ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
