TELEMAC-MASCARET Forum: tide generation force probleme (1/1)

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TOPIC: tide generation force probleme

tide generation force probleme 12 years 9 months ago #3897

mtayel	when i try to run the simulation with tide generation force activated and configurated as follow C:\fakepath\2.jpg C:\fakepath\1.jpg the simulation stop with the following error plante : exit code 2 is there any further configuration i must made for tide generation, please be open to give me any idea thanks for your efforts with me
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Re: tide generation force probleme 12 years 9 months ago #3898

mtayel	excuse me the fotos is here
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Re: tide generation force probleme 12 years 9 months ago #3899

mtayel	there is problem with photos upload bu the configurations for tide force is as follow by using FUDAA preprocessor tide generation force yes longtiude of origin point -3 origin date of time 2006;01;01 origin hour of time 00;00;00
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Re: tide generation force probleme 12 years 9 months ago #3901

jmhervouet	Hello, Do you really have a model large enough to need the tide generation inside ? Please first try without tide generation, only with tide prescribed at the boundary conditions. Then I'll look if there is a problem with this option (which is seldom used). Regards, JMH
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Re: tide generation force probleme 12 years 9 months ago #3903

mtayel	hello I have already tried with prescribed tide at the open boundaries, but after checking the result data inside the domain the high tide has good results but low tide is generally underestimated. attached the result and observation data in excel file i hope the attachment working
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Re: tide generation force probleme 12 years 9 months ago #3909

jmhervouet

Hello,

I have tried to add the tide generating force in the ondem2 test case and it works, so there is no obvious mistake with this option. You can try also with your configuration.

Regarding the problem of low tide: tidal computations on large domains are very sensitive to numerical parameters. You can test the primitive equations with quasi-bubble element:

TREATMENT OF LINEAR SYSTEM : 2 SOLVER : 7
DISCRETIZATIONS IN SPACE : 12;11

and the sensitive parameters are :

IMPLICITATION FOR DEPTH : as close as possible to but greater or equal to 0.5 (but set to 1 with treatment of linear system=2, this will be relaxed in version 6.2)

IMPLICITATION FOR VELOCITY : as close as possible to 0.5

and in a lesser extent :

MASS-LUMPING ON H : 0. (no mass-lumping)

The computer time will be much larger but you'll have an idea of the uncertainty due to numerics.

With best regards,

Jean-Michel Hervouet

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