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

Cant download the source code

Moisés Neto, modified 8 Years ago.

Cant download the source code

Youngling Posts: 2 Join Date: 8/9/12 Recent Posts
Greetings Delft3D users,

I already have Delft3D installed on my PC, but my old licence have expired...

I'm trying to get the source code to continue using the software, but every time i click on the download link this message bother me: You do not have the roles required to access this portlet.

Any suggestions?

Thank u all...
Shawn Harrison, modified 8 Years ago.

RE: Cant download the source code (Answer)

Padawan Posts: 70 Join Date: 6/25/12 Recent Posts
Hi Moisés,

Have you tried to get the source code using subversion or from the https location?

If you have an OSS account, you should have access to the source code (I think) that is available at:

Are you on Windows or Linux?

Good luck!

3. Download Source Code

After registration you can access the Subversion repository. Use your internet browser to have a look at "". Repository "Delft3D" contains branches (isolated develop versions), tags (fully tested, stable versions) and the trunk (where all updates, merges and bug fixes happen). Choose a version you want to download. As a start, use a stable, fully tested version from the tags, for example "". The best version currently available is the tagged version with the highest version number.
Moisés Neto, modified 8 Years ago.

RE: Cant download the source code

Youngling Posts: 2 Join Date: 8/9/12 Recent Posts
I'm on Windows!

Thank you Shawn!