open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello,

I would like to use TELEMAC-2D to simulate the flooding of an industrial area caused by a river.
The geometry I'm using is a plate of the industrial zone being studied, and I'm attaching it to this message.
For the boundary conditions file I've created an open boundary corresponding to the boundary where I want the water to arrive and a second open boundary with a prescribed height to correspond with the culm example.
To simplify my problem I simply wanted to impose a flow of incoming water at the boundary corresponding to the river and so with this flow I wanted to observe the propagation of water between the different buildings in my industrial zone.
However, when I look at the results I get, the velocity value is zero. It would appear that I don't have any water propagation in my model.
I hope I've made myself clear, I can give more details if necessary.

Is the culm example suitable for what I want to do? I'd be grateful for any help you can give me. I've also looked at whether the mersey example could help me, but I don't necessarily want to use the tide for my problem.

Thanks for help

Mathilde

According to your .cli file, the "Earch" is the water level boundary, "River" is the discharge boundary.
Though the first line is "River" node, most of river nodes are from 310 to 379 line of cli file. The "Earth" nodes are from 110 to 180 lines.

So, you should change "T Q(1) SL(2)" to "T Q(2) SL(1)"

Also, change
RESCRIBED FLOWRATES : 25 ; 0. PRESCRIBED ELEVATIONS : 0. ; 66.
to
RESCRIBED FLOWRATES : 0. ; 0. PRESCRIBED ELEVATIONS : 0. ; 0.

Hello,

thanks for your answer, I made the changes you told me but now I have this error:

ITERATION 0 TIME: 0.0000 S
TELEMAC2D INITIALIZED
THE LIQUID BOUNDARIES FILE CONTAINS
289 LINES WITH:
Q(2) SL(1)
DEBIMP: PROBLEM ON BOUNDARY NUMBER 2
GIVE A VELOCITY PROFILE
IN THE BOUNDARY CONDITIONS FILE
OR CHECK THE WATER DEPTHS.
OTHER POSSIBLE CAUSE:
SUPERCRITICAL ENTRY WITH FREE DEPTH
IN THIS CASE GIVE A POSITIVE DEPTH
IN THE INITIAL CONDITIONS
OR PRESCRIBE THE DEPTH AT THE ENTRANCE.

PLANTE: PROGRAM STOPPED AFTER AN ERROR
RETURNING EXIT CODE: 2

I tried changing the value from 2 to 4 in the boundary conditions file for open borders.

Do you have any idea what the problem is?y

Thanks

Mathilde

Hello Mathilde,

This is a classical message when there is no water at a prescribed flowrate boundary.
What about your initial condition? Constant elevation with initial elevation = 0. whereas the bottom elevation at boundary #2 is equal to 0 m!
Try INITIAL ELEVATION = 66. (which is coherent with prescribed elevation a boundary #1.

Hope this helps,

Chi-Tuan

Hello,

Thank you for your help. It worked and I do have water coming into my model. I set the initial height at 1m. However, when I look at the result on Bluekenue, I feel like that the water is coming in through the right-hand side of my geometry (the side where I imposed an open edge with a prescribed height). Do you have an idea why this happens?

I'd like to point out that in my .cli file I set the value 4 in the places corresponding to my open borders.

Thanks

Mathilde

Hello,

I've managed to solve my problem. I wanted to tell you how I did it so that it could be of use to someone else. I decided to modify my boundary conditions file and imposed only an open boundary with a flow rate imposed. I was careful to set the initial water level to a value other than 0m. And it worked, I'm able to see the propagation of the water in my model.

Thanks for help

Mathilde