open TELEMAC-MASCARET The mathematically superior suite of solvers

I would like to ask why the bottom center area will drop after I set the sediment particle size. If I annotate it, there will be no problem. I modified the trisou file to add momentum to some points at the bottom.


Any suggestions would be appreciated
Ziyou

Hello Ziyou,

Looking at your steering file, I have a few remarks:
- please use GAIA rather than sediment features from TELEMAC-3D, it is now the official module to deal with sediment transport both in 2D and 3D,
- I would not use an advection scheme for the advection of sediment which is not mass-conservative as the characteristics you use
(SCHEME FOR ADVECTION OF TRACERS = 1).
Try the LIPS:
SCHEME FOR ADVECTION OF TRACERS = 5 + SCHEME OPTION FOR ADVECTION OF TRACERS = 4
or NERD:
SCHEME FOR ADVECTION OF TRACERS = 13 + SCHEME OPTION FOR ADVECTION OF TRACERS = 1
if you have dry areas in your domain (otherwise you can try PSI or N schemes).

Anyway, in your implementation of TRISOU, you can see for other parts of this subroutine that there is an operation to activate the treatment of the computation of source terms (see type TYPR = 'Q' to be activated, not '0' which means nothing). Your adding would be OK if before CV1 and CV2 are already computed in this subroutine, otherwise it should be first initialised at 0.

Hope this helps,

Chi-Tuan

Hello pham,
Thank you very much for your reply to me. With your guidance, I have tried to use the GAIA module, and the model has further developed in a better direction,I have a few more questions for you.
- My model is driven by a rotor to flow water(As shown in the figure). In order to simulate this effect, I added momentum to some points at the bottom of the TRISOU file, which seems to meet my needs. Is there any problem with this? Or maybe there's a better way to do it
- There are no tidal flats in my calculation area, and I see in the manual that the SCHEME OPTION FOR ADVECTION OF TRACERS (K-EPSILON, VELOCITIES) is best to use the 2 option. But I got an error when I ran the model. Can you make some suggestions about the solver or the setup of the advection scheme?
The following is my modified cas file

I look forward to your reply and wish you a happy life
Ziyou

This is the location I changed in TRISOU