Hello, I have two questions related to DataPostprocessor class, compute_derived_quantities_vector method and add_data_vector. I would appreciate it if someone help me and explain them to me.
1- As far as I tested and understood, when we write data_out.add_data_vector (solver.solution, Ur); we pass a solution vector which has dof_handler.n_dofs() members to add_data_vector and then inside compute_derived_quantities_vector method when I print uh the values relate to the solution values of each cell. For example if we use 4 node elements with 2 dofs on each node and we have totally 125 nodes the size of the vector solution is 375 but uh is a matrix with the size of 4 x 2. Do I understand it correctly? Does data_out.add_data_vector (solver.solution or add_data_vector extract nodal values of each cell from solution vector? Is there any cell iterator defined inside these functions or inside a relater function to take care of the cell sequence? If yes, where is it defined? 2- I want to calculate Sigma_rr and then output it. So inside compute_derived_quantities_scalar I need Sigma_xx, Sigma_xy and Sigma_yy to calculate Sigma_rr. Is there any way to pass a tensor or vector of vectors to add_data_vector, because it seems that it only accepts a vector of scalars? Best regards. Ehsan -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
