Hi,

There are problems of stability.
You should check the model before running it.

I suggest a couple of checks:

 at first run the model in steady state and check if it converges and that the
balance (IN-OUT) is fine for your problem, otherwise you have to control your
input, the number of layers vs deep, mesh etc
then I would rehash the steady state solution and I would run the new model in
transient conditionif that does not work, I would check again the mesh near well
points and verify how the model works without wells.Hoping this will help you!

Don't quit!

Giovanna Monti
environmental engineer
Washington DC


--- Mer 13/5/09, manish_cjonty2006 <manish_cjonty2006@...> ha scritto:

Da: manish_cjonty2006 <manish_cjonty2006@...>
Oggetto: [feflow] to reduce model run time
A: feflow@...
Data: Mercoledì 13 maggio 2009, 12:42


Hello everyone...

I am doing groundwater flow and contaminant transport modeling for saturated
region with transient conditions. I am doing it for 1.0xE4 years. while doing
that i am facing two problems

1.Head values at some of the observation wells are oscillating 10-15 metres

2.Time step is not going beyond 200 days so it is taking so much time for
running. I am using automatic predictor corrector method.

i would like you all to give your suggestions so that i can resolve thee
problems.

Thanks.

Regards,
Manish Chopra