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! 


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: 

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.





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


Message Boards

Clean up of model failed

Lucy Tilsley, modified 2 Years ago.

Clean up of model failed

Youngling Posts: 2 Join Date: 6/28/17 Recent Posts

I had a flow model running no problem (in both 2D and 3D), I then made another model exactly the same but with a new (much finer mesh) grid and now the model still runs but fails just at the end when it gets to the "cleaning" stage.

The error is gives me is "Couldn't open grid nc file: C:/ because of err nr : - 2002" and "Clean up of Flow model has failed"

If I look for results after this, there isn't any time series to query or anything in the model itself but it is still writing the his, map and restart files as outputs which look normal however when I look into those files using Quickplot then the results are clearly not right - somethings gone wrong.

What can I do to fix this cleaning error?
dong cheng, modified 2 Years ago.

RE: Clean up of model failed

Youngling Posts: 3 Join Date: 8/21/17 Recent Posts
I have same question, how can i do.