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

some contents missing, why?

Peng Dai, modified 8 Years ago.

some contents missing, why?

Padawan Posts: 59 Join Date: 8/2/12 Recent Posts
HI, after running a model, I would like to do some tidal analysis for a specific station. but some lines missed in the TRIANA output *.tbb file. This problem also apples for the tba and prt file. what's the problem?
attached is a PNG which illustrates the missing part of the *.tbb file, also all the input file and out put file are included.
Arnout Bijlsma, modified 8 Years ago.

RE: some contents missing, why? (Answer)

Hi, please check the format of hk.obs file.
The record "W 263 280" must be split in 2 records:
263 280