intro story D-Flow FM

 

D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
 
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 

 

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We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.
Please follow this link to the new forum: 
/web/delft3dfm/forum
Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.

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** PLEASE TAG YOUR POST! **

  

 

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

 

Message Boards

RE: What is this error?

Qinghua Ye, modified 7 Years ago.

RE: What is this error?

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
dear Shawn,

The error indicates that one of the nefis files is not found, not opened, or cannot be written in. From the info you provided, I cannot judge which file or which part the file is related.

Would you have more info?

Qinghua
Shawn Harrison, modified 7 Years ago.

RE: What is this error?

Padawan Posts: 70 Join Date: 6/25/12 Recent Posts
Hi Qinghua,

Thanks for your reply..

I have had some trouble with the NEFIS in some of the tutorial problems..

for example in the friesian_tidal_inlet example problem, I get the following warnings:

  Nefis error:
NEFIS message 5010:
Cel 'WIND            ' already exists
  While trying to define a cell for group WIND in file com-tut_fti.def


  Nefis error:
NEFIS message 5014:
Group 'WIND            ' already exists on file 'com-tut_fti.def'.
  While trying to define group WIND in file com-tut_fti.def


  Nefis error:
NEFIS message 5019:
Data group 'WIND            ' already exists in data file 'com-tut_fti.dat'
  While trying to create group WIND in file com-tut_fti.dat

Part VIII - Start Simulation...                            

  Time to finish   0s,    0.0% completed, time steps left  300
  Time to finish   6s,    0.3% completed, time steps left  299
  Time to finish   3s,    0.7% completed, time steps left  298
....
D_Hydro [1342010348.589848] <anonymous> >> d_hydro shutting down normally



Incidentally, this example problem poses a curiosity on my installation:
I can't run any FLOW only examples.. (e.g. 01_standard). However, this FLOW only model runs.. it uses Salinity, Pollutants and tracers, and Wind processes.
When I try to reduce the complexity of this model to resemble a basic sealevel oscillation FLOW model, it will not run.. again with the glibc error!

Any hints?
Qinghua Ye, modified 7 Years ago.

RE: What is this error?

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi, Shawn,

From the copy of the screen, it shows the model works fine. Notice the last sentence: d_hydro is shutting down normally.

The error messages above the sentence will disappear when you delete the old com files in the project folder before you start a new run.

Regards,

Qinghua
Shawn Harrison, modified 7 Years ago.

RE: What is this error?

Padawan Posts: 70 Join Date: 6/25/12 Recent Posts
OK..

But, if I unselect the options to include Salinity and Pollutants, then the model will not run.
It will work If I select Salinity again.

Weird.. any idea?
Qinghua Ye, modified 7 Years ago.

RE: What is this error?

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
dear Shawn,

did you solve the problem already or still have it?

Qinghua
Shawn Harrison, modified 7 Years ago.

RE: What is this error?

Padawan Posts: 70 Join Date: 6/25/12 Recent Posts
Hi Qinghua,

In a different thread, you had me recompile the latest trunk and gave me a new d3d_publish.f90 file. Initially, the recompile didn't solve the problem, but once you gave me the new d3d_publish.f90 file and I recompiled, everything worked well. I am curious - what was in that f90 file?

Cheers,
Shawn
Qinghua Ye, modified 7 Years ago.

RE: What is this error?

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
dear Shawn,

Some unused pointers are removed from the code. Some compiler can bare with it, while others might complain.

It has been updated into the trunk code as well.

Cheers,

Qinghua
Shawn Harrison, modified 7 Years ago.

RE: What is this error?

Padawan Posts: 70 Join Date: 6/25/12 Recent Posts
Cool.. thanks.
BTW, D3D still working well. She's humming a treat.

Regards,
Shawn