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No results file when using variable time-step
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TOPIC: No results file when using variable time-step

No results file when using variable time-step 6 years 8 months ago #29283

  • Mustermann
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Hello

I model an estuary and and try to use variable time-steps. The only problem I'm facing is that Telemac does not create a results file as soon as I use a variable time-step.
If I'm using a fixed time-step everything runs fine and I get a results file.
What can I change that it will create a results file with variable-time step? I have set the desired courant number =2.

Thanks in advance.
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No results file when using variable time-step 6 years 8 months ago #29287

  • amanj2013
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Hello,

Is it possible to post your input files such as CAS, serafin and BC file as well fortran file?

What is the log file saying while the computation done? is there any message to post here?

AMANJ
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No results file when using variable time-step 6 years 8 months ago #29288

  • Mustermann
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Yes of course.

The message is the following.
|runCode: Fail to run
   |/opt/intel/compilers_and_libraries_2018/linux/mpi/bin64/mpiexec -wdir /home/tvrl/telemac/v7p2/Hornjafjordur/Telemac2d/20180314/Horna_20180301.cas_2018-03-15-09h29min08s -n 4 /home/tvrl/telemac/v7p2/Hornjafjordur/Telemac2d/20180314/Horna_20180301.cas_2018-03-15-09h29min08s/out_telemac2d
   |~~~~~~~~~~~~~~~~~~
   |1
   |1
   |~~~~~~~~~~~~~~~~~~

As soon as I comment out the variable timestep everything is running fine.
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No results file when using variable time-step 6 years 8 months ago #29289

  • c.coulet
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Hi
Before going further, could you check the varaible time step works on sequential mode.
Otherwise, thinking about the way telemac manage parallel computation and variable time step, I'm not sure it's possible to use the variable time step in parallel...
The variable time step is computed according to the courant number of the model and as the model is decomposed in various subdomain, I Wonder if there is an harmonization of the time step computed by each subdomain...

Regards
Christophe
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No results file when using variable time-step 6 years 8 months ago #29290

  • Mustermann
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Hi,

I tried it but get the same failure.
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No results file when using variable time-step 6 years 8 months ago #29291

  • c.coulet
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Try to print all time step in the listing
Join the liquid file in order to let us try...

Regards
Christophe
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No results file when using variable time-step 6 years 8 months ago #29317

  • Mustermann
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Sorry that it took me so long still try to fix my boundaries.

Attached you will find the whole model and the printout.

Best

Edit: I can not attach the printout since the file is to large for the forum.

These are the last lines I always get
--------------------------------------------------------------------------------
                          ADVECTION STEP
--------------------------------------------------------------------------------
                    DIFFUSION-PROPAGATION STEP
 EQUNOR (BIEF) :       27 ITERATIONS, RELATIVE PRECISION:   0.9053912E-04
 POSITIVE DEPTHS OBTAINED IN     2 ITERATIONS
--------------------------------------------------------------------------------
                          K-EPSILON MODEL
 GRACJG (BIEF) :        4 ITERATIONS, RELATIVE PRECISION:   0.1550857E-09
 GRACJG (BIEF) :        3 ITERATIONS, ABSOLUTE PRECISION:   0.2365022E-09
--------------------------------------------------------------------------------
                       BALANCE OF WATER VOLUME
     VOLUME IN THE DOMAIN :   0.1901093E+10 M3
     FLUX BOUNDARY    1:     7710.208     M3/S  ( >0 : ENTERING  <0 : EXITING )
     RELATIVE ERROR IN VOLUME AT T =       0.9060E+05 S :   -0.7538915E-16
     MAXIMUM COURANT NUMBER:     1.232344
     TIME-STEP                 :    10.00000

================================================================================
 ITERATION    10058    TIME:    1 D  1 H 10 MN   7.9526 S   (    90607.9526 S)
_____________
runcode::main:
:
   |runCode: Fail to run
   |/opt/intel/compilers_and_libraries_2018/linux/mpi/bin64/mpiexec -wdir /home/tvrl/telemac/v7p2/Hornjafjordur/Telemac2d/20180316/Horna_20180301_halfclosed.cas_2018-03-16-16h05min57s -n 4 /home/tvrl/telemac/v7p2/Hornjafjordur/Telemac2d/20180316/Horna_20180301_halfclosed.cas_2018-03-16-16h05min57s/out_telemac2d
   |~~~~~~~~~~~~~~~~~~
   |1
   |1
   |~~~~~~~~~~~~~~~~~~
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No results file when using variable time-step 6 years 8 months ago #29325

  • EnGlobe
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Hi Clements,

It's because your simulation is at time 90607.9526 S and you only provide a boundary condition until 90600s. Just add an extra line with to the boundary condition file.

Regards,
Patrick
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No results file when using variable time-step 6 years 8 months ago #29326

  • Mustermann
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Hi Patrick,

I will try. Just a question. How could you the time the model runs, since I set the the DURATION = 90600s so it should not running longer than that.

Regards,
Clemens
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No results file when using variable time-step 6 years 8 months ago #29327

  • EnGlobe
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Hi Clemens,

It's because of the variable timestep. 90597s is the previous time which is shorter then 90600s and then telemac takes an other step to 90607s.

Patrick
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