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

Tclkit does not responding

Matteo Mattioli, modified 7 Years ago.

Tclkit does not responding

Youngling Posts: 2 Join Date: 2/28/12 Recent Posts
Dear Deltares,
I'm performing an online wave-flow simulation with delft3d (cyclone model). Domain decomposition for flow and Swan nesting for waves.
After the start the dialog window stop writing on video and the software TCLkit (strandalone) does not responding.
If I stop the process the flow-wave simulation goes on. Do you know what's happen?
Can be the large amount of messages (wrong coupling point ad domain decomposition)?

Best regards and thanks for your support.
Qinghua Ye, modified 7 Years ago.

RE: Tclkit does not responding (Answer)

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi Matteo,

Did you check the tri-diag file the run generated? There may give a reason why the windows hang there..