19 August 2018 05:19:10 PM

FEM2D_POISSON_SPARSE:
  C++ version:

  Compiled on Aug 19 2018 at 17:19:10.

  A finite element method solver for the Poisson problem
  in an arbitrary triangulated region in 2 dimensions,
  using sparse storage and an iterative solver.

  - DEL H(x,y) DEL U(x,y) + K(x,y) * U(x,y) = F(x,y) in the region

                                     U(x,y) = G(x,y) on the boundary.

  The finite element method is used,
  with triangular elements,
  which must be a 3 node linear triangle.

  Node file is "baffle_nodes.txt".
  Element file is "baffle_elements.txt".
  Number of nodes =          512

  First 10 nodes

  Row:       1             2       
  Col

    1              0             1
    2              0         1.375
    3              0          1.75
    4              0         2.125
    5              0           2.5
    6              0         2.875
    7              0          3.25
    8              0         3.625
    9              0             4
   10              0         4.375

  Element order =            3
  Number of elements =       874

  First 10 elements

  Row:      1       2       3  
  Col

    1     317     306     298  
    2      28       3      18  
    3       4       3      28  
    4      28      33       4  
    5      72      69      57  
    6      49      33      28  
    7     114     106     122  
    8      84      80      67  
    9      88      69      72  
   10     147     133     131  

  Quadrature order =          3

  Number of nonzero coefficients NZ_NUM = 3308
  ITR = 1  Residual = 22.4453
  K =   1  Residual = 8.1109
  K =   2  Residual = 5.46359
  K =   3  Residual = 3.72912
  K =   4  Residual = 2.70686
  K =   5  Residual = 2.01206
  K =   6  Residual = 1.3362
  K =   7  Residual = 0.77398
  K =   8  Residual = 0.399518
  K =   9  Residual = 0.217129
  K =   10  Residual = 0.126072
  K =   11  Residual = 0.0718644
  K =   12  Residual = 0.0382729
  K =   13  Residual = 0.0218797
  K =   14  Residual = 0.0141424
  K =   15  Residual = 0.00895071
  K =   16  Residual = 0.00483571
  K =   17  Residual = 0.00257604
  K =   18  Residual = 0.00138985
  K =   19  Residual = 0.000822672
  K =   20  Residual = 0.000531744
  ITR = 2  Residual = 0.000531744
  K =   1  Residual = 0.000400467
  K =   2  Residual = 0.000252209
  K =   3  Residual = 0.000143165
  K =   4  Residual = 7.72489e-05
  K =   5  Residual = 4.29428e-05
  K =   6  Residual = 2.65632e-05
  K =   7  Residual = 1.67421e-05
  K =   8  Residual = 9.74224e-06
  K =   9  Residual = 5.45471e-06
  K =   10  Residual = 2.98395e-06
  K =   11  Residual = 1.5875e-06
  K =   12  Residual = 8.4608e-07

MGMRES
  Number of iterations = 32
  Final residual = 8.4608e-07

  Part of the solution vector vector U:

         1       9.99811e-10
         2       4.37755e-09
         3       3.79708e-09
         4       2.57116e-09
         5       1.90107e-09
         6       3.02659e-10
         7       1.17906e-09
         8       5.03328e-10
         9       2.00627e-10
        10       2.90198e-09

FEM2D_POISSON_SPARSE:
  Wrote an ASCII file
    "baffle_values.txt".
  of the form
    U ( X(I), Y(I) )
  which can be used for plotting.

FEM2D_POISSON_SPARSE:
  Normal end of execution.

19 August 2018 05:19:10 PM