TELEMAC-MASCARET Forum: difference between two models (1/1)

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TOPIC: difference between two models

difference between two models 7 years 10 months ago #24837

jonathan

Hi all,

I ran a model few month ago with the version v6p3. We decided to refine the scale of the mesh so i ran a new model but with the version v7p1r0 this time using the same cas file and submission file. However when I do the validation process the old model is better than the new one. it seems that initial condions elevation of the newmodel is not the same (depending on the site but sometimes higher and sometimes smaller) but i changed absolutely nothing in the cas file. Does someone have an idea from where it could comes from?

regards

Jonathan demmer

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difference between two models 7 years 10 months ago #24838

c.coulet OFFLINE Moderator Posts: 3722 Thank you received: 1031	Hi It could be interesting for us to know how you define the initial condition... I suppose it's an automatic computation based on TPXO altimetry or something similar... Another option is a change in the code of a default value or a harcoded value for some parameter but in this case, this should not affect the initial values... Hope this helps
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difference between two models 7 years 10 months ago #24839

jonathan	The initial donditions = 0,Yes you right it comes from tpxo altymetry!! The cas fil is attached within this email. thanks for your answer Attachments: IrishSea2_...1-17.cas (4KB)
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difference between two models 7 years 10 months ago #24840

c.coulet OFFLINE Moderator Posts: 3722 Thank you received: 1031	HI Could you post an illustration of the initial difference? About the cas file, I think it could be better to avoid "variable time-step"... Regards
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difference between two models 7 years 10 months ago #24841

jonathan	Here the different difference between the two model on different interest sites. thank you jonathan
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difference between two models 7 years 10 months ago #24920

riadh

Hello Jonathan

Sorry for this late reply.
when you upgrade from an old version to v7p1, and if in your model uses tidal options, you need to take care about the keyword OPTION FOR TIDAL BOUNDARY CONDITIONS (OPTION POUR LES CONDITIONS AUX LIMITES DE MAREE) which was only one value for all boundaries and then changed to several values since V7p1.
you need thus to introduce exactly the same number of options than the number of liquid boundaries of your model.

I hope that this helps

with my best regards

Riadh

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difference between two models 7 years 10 months ago #24995

jonathan	Hello, Thank you for your answer!!! I change OPTION FOR TIDAL BOUNDARY CONDITIONS as you suggest but istill have the same problem. Furthermore, I have a problem at the north boundary as you can see on the file attached within this email. Do you have an idea where does it come from? thank you agian Jonathan Demmer Attachments: Northboundary.jpg (15KB)
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