TELEMAC-MASCARET Forum: Warning 'NO WIND GIVEN OR VERY WEAK VALUE OF WIND' (1/1)

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TOPIC: Warning 'NO WIND GIVEN OR VERY WEAK VALUE OF WIND'

Warning 'NO WIND GIVEN OR VERY WEAK VALUE OF WIND' 7 years 9 months ago #25032

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I get the above message in the sortie file for a simulation where a wind of 25 m/s (a bit less than 100 km/h) is applied. I understand this can just be an oversight. The results are OK, but not so much so to be conclusive.

The question: is this warning message just an oversight in the code or, rather, a hint that the application of the wind forcing is not handled correctly?

Could expert eyeballs please double-check this? At the very least this message could be removed being misleading.

Thanks for dealing with this.

Disclaimer. I have searched the forum with the query www.opentelemac.org/index.php/kunena/sea...te=all&childforums=1 to no avail. Apologies if this is a duplicate -- please redirect to valid answers as applicable. Thanks

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Warning 'NO WIND GIVEN OR VERY WEAK VALUE OF WIND' 7 years 9 months ago #25042

riadh	Hello Which version are you using ? I tried to retrieve this warning error but vainly. with my kind regards Riadh
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Warning 'NO WIND GIVEN OR VERY WEAK VALUE OF WIND' 7 years 9 months ago #25050

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v7p0r1 -- see below to see where it shows up, between the boundary condition summary and the begin of the time integration.

...
BOUNDARY 1 :
BEGINS AT BOUNDARY POINT: 1 , WITH GLOBAL NUMBER: 2011
AND COORDINATES: 0.000000 0.000000
ENDS AT BOUNDARY POINT: 411 , WITH GLOBAL NUMBER: 1
AND COORDINATES: 0.000000 250.0000

CORFON (TELEMAC2D): NO MODIFICATION OF BOTTOM

NO WIND GIVEN OR VERY WEAK VALUE OF WIND

================================================================================
ITERATION 0 TIME: 0.0000 S

================================================================================
ITERATION 1 TIME: 5.0000 S

DIFFUSION-PROPAGATION STEP
GMRES (BIEF) : 16 ITERATIONS, RELATIVE PRECISION: 0.6057810E-12

BALANCE OF WATER VOLUME
VOLUME IN THE DOMAIN : 2500005. M3
FLUX BOUNDARY 1: -0.000000 M3/S ( >0 : ENTERING <0 : EXITING )
RELATIVE ERROR IN VOLUME AT T = 5.000 S : -0.1874996E-05
...

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Warning 'NO WIND GIVEN OR VERY WEAK VALUE OF WIND' 7 years 9 months ago #25052

riadh	OK this makes sense ! This warning was removed from v7p1. It was due to the fact the the wind velocity can be given either by x and y components or by magnitude and direction. In the first case, the warning appears because the magnitude, which is initialeized to 0, is not changing (and not computed) during the time. Thank you for the hint, with my kind regards Riadh
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