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

Suggested manual improvement - better documentation of MDF file keywords

Richard Measures, modified 8 Years ago.

Suggested manual improvement - better documentation of MDF file keywords

Jedi Knight Posts: 178 Join Date: 3/23/11 Recent Posts

Just a quick comment / suggestion to improve the delft3d-flow manual:

I find the table contained in section A.1 containing a description of the MDF file keyword very useful - however, because it is only based on the example in chapter 5 it misses many keywords (e.g. Filic, Filrgh, Filsed, Filmor, I0, Filgat, Trtrou, etc). I realise that many of these keywords are mentioned elsewhere in the manual but it would be a really useful resource if this table was expanded in into the same style as something like table B.9 containing all the possible keywords - it could then give information like the default value for the parameters and cross reference to the parts of the manual where those keywords are described in more detail. This would really help when going through the *.mdf file in a text editor.