[Nek5000-users] Information in output file

[nek5000-users at lists.mcs.anl.gov]

Deak Neks,

  I am new to NEK5000. I need help in understanding the contents
of the output file. I understand that the four columns corresponding
to "Hlmholtz" lines are iteration and tolerance information (kindly
correct me if otherwise). What do the numbers in the four lines that follow
represent? What are alpha and alph12?

23 1.8000920E+02 Perturbation Solve:    1
          23    Hmholtz VELX:     12   4.8636E-13   2.1640E-01 1.0000E-12
          23    Hmholtz VELY:     12   2.5736E-13   1.5550E-01 1.0000E-12
          23    Hmholtz VELZ:     12   7.1335E-13   2.6858E-01 1.0000E-12
    23   20 alpha:  3.4675E-01  2.0377E-02  1.6467E-02 -5.1081E-02 
-1.1948E-02  3.2566E-02 -3.4915E-03 -9.6668E-03 -9.1184E-03  1.0323E-03
     23  20  2.8358E-02  5.7262E-07  4.9524E+04 alph12
         23 U-PRES gmres:    120  4.9518E-11  1.0000E-11 5.7262E-07  
2.0179E+00  3.8401E+00
Step     24, t= 1.8000960E+02, DT= 4.0000000E-04, C=   .273 9.2289E+01 
4.1700E+00
  PERTURBATION SOLVE
  PERTURBATION SOLVE

Thanks.

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