On Mon, Mar 26, 2018 at 1:07 AM, Gauvain Wu <causegauv...@gmail.com> wrote:
> Hi all, > I was running the offline stage of a reduced basis model. At the > beginning, the maximum error bound decreased at a normal rate and the value > appeared acceptable (around 20000). However, when the basis dimension > increased to 6, the maximum error bound climbed drastically to e+149 or so > and didn't decrease any more. What I had modified was the range of the > parameters which is listed below: > beta_T0 = '1.e3 3.e3' # min, max values > rho_c = '2.4 4.5' > heat_flux = '20 30' > h = '0 1' > h_(Tinf-T0)='0 1' > G = '7.e4 9.e4' > lambda = '2.e5 4.e5' > beta = '5 15' > k = '10 20' > The code was run with option mpirun -np 4 ./Thermoelasticity-opt > -online_mode 0 -ksp_type preonly -pc_type lu -pc_factor_mat_solver_package > mumps. Could anyone give a hint of what causes this problem? Thanks in > advance. > I don't know what the problem is, but note that you have 9 parameters here which is a lot of parameters for an RB model. It may not be practical to use this many parameters in your case. I would suggest starting with 1 parameter (set the other parameters to fixed values) and make sure that works, then go to 2 parameters, etc. That may help you to figure out what the issue is as well. David > > via Newton Mail [https://cloudmagic.com/k/d/ma > ilapp?ct=dw&cv=9.8.284&pv=10.0&source=email_footer_2] > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Libmesh-users mailing list > Libmesh-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
