Lagragian Module DT EMIT

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cinthya.gomez@gmail.com
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Lagragian Module DT EMIT

Postby cinthya.gomez@gmail.com » Tue Dec 11, 2012 15:25

Hello,
I'm trying to run a simulation in Mohid, using the Lagrangian module.

But I have a question, I'm trying to model a fecal coliform discharge using a time series (this time serie is set in hours, every hour a different concentration is discharge), but in the Lagranian module I used a continuous emission with a DT EMIT of 150s.

I don't know if this is correct, because my results doesn't look realistic.
If the emission is every 150s, this means that for the first hour use the concentration set for this hour and emitted every 150s, then the next hour use the other concentration and emitted every 150s.

Can someone explain to me how does this works, or if I'm doing something wrong

Cinthya

luis_at_mohid.com
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Re: Lagragian Module DT EMIT

Postby luis_at_mohid.com » Wed May 08, 2013 08:13

Hi Cinthya,

The model interpolates the concentration for each time instant based on the two closest values in the time series. For example if at hour 1 the value is 100 and at hour 2 the value is 300 then at 1.5 hours the value used by the model is 200.
If the model is not reproducing well observations, you should check for the quality of the hydrodynamics results, turbulence parameterization and discharge setup.

Cheers,
Luis


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