Waterproperties instability

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s91012514@naver.com
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Joined: Fri Apr 08, 2016 00:47

Waterproperties instability

Postby s91012514@naver.com » Mon May 23, 2016 07:33

Dear all.

Hi.

I am trying to apply MOHID3D to a nearshore zone with somewhat complicated coastlines and islets, but it crashes over and over.
Here is the description of my simulation:

-I used the same modules as in the Tagus sample only without discharge module.

-My bathymetry was made by MOHID Studio using the option of constant spaced grid, (DX, DY = 0.005 dgree).

-Tide was generated as fes2004.nc

When I tried a time increment DT=10sec (Courant Number is 1.015), the model ran very well.
But when DT was bigger than 10sec (Courant Number exists between 3 and 4), the model execution after several time steps stopped showing a log message like


T,S,i,j,k
-9.8999995E+15 -9.8999995E+15 227 342 2

Then I turned off the keyword ADVECTION_DIFFUSION (other options are the same), and found that the model ran well (even with DT=30).

Can anybody tell me how to get a complete run even with (DT =30, ADVECTION_DIFFUSION : 1)?

Thanks in advance.



Hanuel Kang

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