open TELEMAC-MASCARET The mathematically superior suite of solvers

hello everyone,
i have a problem with wind and tide toghether.
Only tides give me a good result but when i insert a costant wind on the sea i have this problem:


ADVECTION STEP

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DIFFUSION-PROPAGATION STEP
EQUNOR (BIEF) : EXCEEDING MAXIMUM ITERATIONS: 100 RELATIVE PRECISION: NaN

================================================================================
ITERATION 27 TIME: 6 MN 45.0000 S ( 405.0000 S)

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this output it's the same from start.
i attached to you my .cas file.

best regards
Ruben

Hi, I believe your wind coefficient which you specified as 1.2615E-3 should in fact be 1.2615E-6 to included division by water density required in the telemac governing equation formulation
I believe there have been previous forum's posts highlightening this same problem

Regards
Tony C

hi,
the results are the same with each value of wind coefficient.
it isn't this the problem.
thank you anyway,
best regards

I could not test your model as you have not provided the xyz file.
However your Steering File should be WIND = YES (not true)
and the wind coefficient should be to the power of E_06 not
Also if you are specifying a constant wind in time and space then OPTION FOR WIND =1 (not 2)

I hope this helps

Regards
Tony C

hi tony,
first of all thank you for your reply.
i tryed to correct my work in this kind: I do set a previous computation file with a file with only tides and I forced my sistem with a costant wind.
I corrected the coefficient of wind influence like you have tell to me.
the results with wind or without wind are very similar..
it's strange...
anyway i attached my topography file.
the analysis without previous computetion file give me always the same result.. NaN..
thank you
best regards

Hello

I guess that your time step is no more adapted to the model forced by wind. Decrease time step and increase the maximum number of iteration for solver.

with my best regards

Riadh