Dear All
I'm trying to set up inundation problem in Gulf of Thailand.
It's blowing up in few steps as shown error below with "DIAG speed trouble 46.2305206398322"
For grid preparation: The minimum depth was -5m.
I also attached the log file of this case.
I dont know how to solve the problem. Please suggest some ideas.
Best Regards,
Tuk
Inundation Blowing Up
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- Posts: 12
- Joined: Mon May 02, 2016 12:54 pm
- Location: Kasetsart University
Inundation Blowing Up
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Re: Inundation Blowing Up
Have you tried a shorter timestep? It is blowing up so fast that is likely to be a contributing factor. After that, you need to be looking at how and where it is going bad. Wetting and drying problems can be tricky. I have gone so far as to manually edit the bathymetry in the wet-dry places to make it behave.
Re: Inundation Blowing Up
Your log file shows you have set "nested" open boundary conditions for some variables but you have only one grid.
You have also mixed "gradient" and "closed" along the same boundary, so that can't be right.
Your initial conditions show a starting ubar and vbar of 4.5 and 5.7 m/s which is very fast so that is going to be a difficult spin-up. Plus, those values exceed the corresponding initial u,v max values, so they must be inconsistent.
ndtfast = 5 is a very small subdivision of the baroclinic time step. It is recommended not to go less than 20 to 30 for ndtfast.
You have also mixed "gradient" and "closed" along the same boundary, so that can't be right.
Your initial conditions show a starting ubar and vbar of 4.5 and 5.7 m/s which is very fast so that is going to be a difficult spin-up. Plus, those values exceed the corresponding initial u,v max values, so they must be inconsistent.
ndtfast = 5 is a very small subdivision of the baroclinic time step. It is recommended not to go less than 20 to 30 for ndtfast.
John Wilkin: DMCS Rutgers University
71 Dudley Rd, New Brunswick, NJ 08901-8521, USA. ph: 609-630-0559 jwilkin@rutgers.edu
71 Dudley Rd, New Brunswick, NJ 08901-8521, USA. ph: 609-630-0559 jwilkin@rutgers.edu