intro story Coast / Estuary

Coast / Estuary

Coastal systems are among the most dynamic physical systems on earth and are subject to a large variety of forces. The morphodynamic changes occurring to coastlines worldwide are of great interest and importance. These changes occur as a result of the erosion of sediments, its subsequent transport as bed load or suspended load, and eventual deposition. 
 
Estuaries are partly enclosed water bodies that have an open connection to the coast. Estuaries generally have one or more branching channels, intertidal mudflats and/or salt marshes. Intertidal areas are of high ecological importance and trap sediments (sands, silts, clays and organic matter).
Within the Delft3D modelling package a large variation of coastal and estuarine physical and chemical processes can be simulated. These include waves, tidal propagation, wind- or wave-induced water level setup, flow induced by salinity or temperature gradients, sand and mud transport, water quality and changing bathymetry (morphology). Delft3D can also be used operationally e.g. storm, surge and algal bloom forecasting. 
 
On this discussion page you can post questions, research discussions or just share your experience about modelling coastal and/or estuarine systems with Delft3D FM. 
 

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Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 

 

Message Boards

What means of 'Error flow exited abornmally'

LT
lynn tysz, modified 7 Years ago.

What means of 'Error flow exited abornmally'

Youngling Posts: 3 Join Date: 11/29/12 Recent Posts
The information is below
Waring Velocity change too high > 5.00 m/s (per 0.5 DT)
WARNING No convergence in UZD at tstep: 3059
WARNING Bed change exceeds 5.0 % of waterdepth after 3060 timesteps, location (m,n) = (56,99)
.....
.....
Then ERROR Flow exited abnormally
The compution end.

Who could help me explantion the message above
How to solve it?

Thanks
Adri Mourits, modified 7 Years ago.

RE: What means of 'Error flow exited abornmally' (Answer)

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Lynn,

You probably have to decrease your time step. Check the Courant number of your model. See the manual sections "6.5 Frequently asked questions" and "4.5.3 Time frame". Or check this post.

Regards,

Adri
LT
lynn tysz, modified 7 Years ago.

RE: What means of 'Error flow exited abornmally'

Youngling Posts: 3 Join Date: 11/29/12 Recent Posts
hi, Adri Mourits
Thanks for your good guide.
I'm working on it from your guide.