next up previous index
Next: Lock-up Up: Output Previous: Write or plot computed   Index

Write or plot intermediate results


\begin{picture}(18,0.12)
\thicklines
\put(0,0){\line(1,0){17}}
\put(0,0.1){\line(1,0){17}}
\end{picture}

                                |        | < [i] [j] >  |   |
                                | -> IJ <                >  |
TEST  [itest] [itrace]  POINTS <         | < [k] >      |    >   &
                                |                           |
                                |    XY < [x] [y] >         |

      (PAR `fname')  (S1D `fname') (S2D `fname')

\begin{picture}(18,0.12)
\thicklines
\put(0,0){\line(1,0){17}}
\put(0,0.1){\line(1,0){17}}
\end{picture}

If SWAN produces unexpected results, this optional command can be used to instruct the program to produce intermediate results during a SWAN run (test output). A TEST command may change between commands in the file to change the level of test output during a SWAN run. This change occurs during the execution of the run. A TEST command controls the test output until the next TEST command. Such a next TEST command may have level 0, thus stopping test output.


[itest] the level of test output. For values under 100 the amount is usually reasonable,  
  for values above 200 it can be very large. For values of [itest] up to 50 the  
  test output can be interpreted by the user. For higher values of [itest] the  
  test output can only be interpreted by those who have the program source listing  
  at their disposal. Note that for sequential or parallel runs, it might be interesting  
  to print the timings (both wall-clock and CPU times in seconds) in the PRINT file;  
  for this [itest] should be set to 1.  
  Default: [itest] = 1.  
[itrace] SWAN writes a message (name of subroutine) to the PRINT file at the first  
  [itrace] entries of each subroutine.  
  Default: [itrace] = 0.  
POINTS if this option is used, the user instructs SWAN to produce detailed print output  
  during the computational process for a grid point of the computational grid.  
  Output at a maximum of 50 grid points is possible. This option can be used  
  only after the bathymetry has been read (see command READINP BOTTOM).  
IJ the test points are defined by means of grid indices.  
[i], [j] grid indices of a test point. Values of [i] range between 0 and [mxc]  
  (see command CGRID), values of [j] between 0 and [myc] (inclusive).  
  ONLY MEANT FOR STRUCTURED GRIDS.  
[k] vertex index of a test point. This can be obtained in a grid generator file  
  (fort.14, .node and .n files of ADCIRC, Triangle and Easymesh, respectively).  
  ONLY MEANT FOR UNSTRUCTURED GRIDS.  
XY the test points are defined in terms of problem coordinates; SWAN will determine  
  the nearest grid points. Output will be made for this selected grid point.  
[x], [y] coordinates of a test point (problem coordinates in m in case of Cartesian  
  coordinates, or longitude and latitude in degrees in case of spherical coordinates,  
  see command COORD).  
PAR integral parameters for test points are written: HSIGN, RTM01 (see  
  Appendix A for definitions) and Swind, Swcap, Ssurf, Sfric, Snl3  
  and Snl4 which are the integrals over frequency and direction of the respective  
  source terms (wind input, whitecapping, depth-induced breaking, bottom friction,  
  absolute value of the triad wave-wave interactions and absolute value of the  
  quadruplet wave-wave interactions).  
S1D if the keyword S1D appears variance densities and 6 source terms (see end of  
  this list of options) as computed will be printed as 1D spectral (frequency) output.  
  The definition of this file is given in Appendix D. This output will be made after  
  every iteration in the case of MODE STATIONARY, and after every time step  
  in the case MODE NONSTATIONARY (see command MODE).  
`fname' name of the file to which the output is written; default filename: SWSRC1D.  
S2D if the keyword S2D appears variance densities and 6 source terms (see end of  
  this list of options) as computed will be printed as 2D (frequency and direction)  
  spectral output. The format of this file is defined in Appendix D. This output will  
  be made after every iteration in the case of MODE STATIONARY, and after every  
  time step in the case MODE NONSTATIONARY (see command MODE).  
`fname' name of the file to which the output is written; default filename: SWSRC2D.  

Note that the keywords PAR, S1D and S2D need to be given in that order.


The source terms written due to the presence of the keyword S1D or S2D are source terms of variance density. The 6 source terms are: wind input, whitecapping, bottom friction, breaking, 3-wave interactions and 4-wave interactions.


When a number [maxmes] of error messages, see command SET, have been written to the PRINT file, the computation will stop. If necessary make [maxmes] larger using command SET, and rerun the program.


next up previous index
Next: Lock-up Up: Output Previous: Write or plot computed   Index
The SWAN team 2017-03-23