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Hello,
I have a problem with my simulation.
At the end of simulation the flux boundary not converge at same value.
I don't understand why.
Can you help me , please!
I attach the model.

Hi
Is the simulation time long enough?
Simulation is converging or diverging?
Which version?

Regards

Hi,
the version is v7p2r1. The number of time steps is 4000 and the time step is 1.
The simulation finish correctly and i view the result, but flux boundary 1 and 2 value is not the same. For example the last simulation value is
FLUX BOUNDARY 1 1.0000 M3/S
FLUX BOUNDARY 2 -0.3555555 M3/S
VOLUME....THE DOMAIN 379 M3
TOTAL VOLUME LOST: 0.51666666 E-4 M3

upgrade your version to the official release, this is a pre-requisite for assistance...
Did you try to double the number of time steps?

yes, i double the number of time step and now the simulation is running. I wait for the end to see what results it gives.
thank you.

During the simulation, flux boundary 1 is corrent at value i imposed by prescribed flowrates, but the flux boundary 2 it decreases with each subsequent step.
I imposed prescribed elevation to the water level to the value that corresponds to the input flow.
I imposed also intial depth=0.20 m for simulate dry domain.

I didn't open you model but it could take time to establish a steady state from scratch...
You should check if the model tends to a steady state on some area (from upstream to downstream)

You should have a look at your results, your bassin is slowly filling up with about 0.5m3/s flowing through your culvert with 116,8 m water elevaton. With 100,000 m2 surface it takes 2000s to increase 0.01m!


Maybe adjust your initial condition to arrive faster at equilibirum condition.

Patrick

Thank you so much Patrick,
I try to modify the initial condition and now the simulation arrive at equilibrium condition.