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Hi,

I am modeling the hydro-sedimentary in an estuary by coupling TELAMAC3D with GAIA. As I realize a simulation over a period of 6 to 7 months, I would like to make a restart.

Currently, I am able to run the first part of the calculation without any problem with consistent output values. However, when I run my second calculation, I still get the same error (error.txt). I can only manage to run this simulation if I comment out the initial values of my tracers, but in this case the output file gives me zero values for all tracers. I already tried to remove some subroutine which initialized parameters without success.

My model has 2 tracers: salinity and a CO sediment created by GAIA. At t=0s, the salinity is set to 34.5 in the ocean and not in the river (thanks to the modification of user_condi3d_trac.f subroutine). Thereafter, this value remains constant in the ocean. As for the CO sediment, it is sent every hour to 2 different boundaries with different values (liquid file). At these 2 boundaries I apply a flow rate that also varies every hour. Furthermore, I have initialized a mud layer at a particular place of my domain, which will normally vary during the time.

CONBOT and CONSUR are 2 output variables that I have created to allow me to output the concentration of the sediment at the bottom and at the surface.

What I want to know is how I should retrieve the values from the previous calculation when I run the second calculation. I can't put the same initial values in the 'cas' file as in the first simulation since this would be wrong. I don't know what changes I need to make to run the simulation without problems...


I have attached my 'cas', 'liq' and error files. If it is necessary for me to give you my routine, I will place them. To test if the restart works, I run 2 simulations of 5 min.

Best regards,
Garance

Hi,

I write this reply for those who will have the same problem as me. I found the issue and now I can restart my model whenever I want.

As I run a model with only the mud, for me it was not nesseceray to represent the erosion at the bottom. That is why, TELEMAC imposed a 0 as default value, which made diverge some variables. So if you study only the sediment suspension without erosion, you have to exit the B and R variables in the GAIA steering file and then you can make easily a restart.

Best regards,
Garance

Hi Garance,

What is B and R variables ?
I'm modelling the flume (suspended sediments) without looking on erosion.
Ralph