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

Downloading and installing the GUI

Ricky Leung, modified 7 Years ago.

Downloading and installing the GUI

I had downloaded and compiled the source code from "". It runs fine following the webminar examples.

However, I am not sure if I did the right things for obtaining the GUI files. I had sent multiple requests following the instructions on this page "", but there is no reply. I would like to ask if there is anything else I need to do?

Thank you very much for your reply.

Tanja Luijer, modified 7 Years ago.

RE: Downloading and installing the GUI (Answer)

Dear Ricky,

We have been quite busy here lately, due to DELWAQ going open source, so unfortunately we did not manage to deal with your request immediately. We sent you the download link + license file + instructions today.

Good luck with modelling with Delft3D!

Ricky Leung, modified 7 Years ago.

RE: Downloading and installing the GUI

Thanks a lot. I got the email already emoticon