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

How to obtain D3d GUI

Peng DAI, modified 8 Years ago.

How to obtain D3d GUI

Youngling Posts: 1 Join Date: 7/7/12 Recent Posts
Hi all

After install the d3d source code, how can I get the GUI, Instead of seeing the "TEMPORARY EXTRA SERVICE" on the top of the download page, "You don't have the roles required to access the portlet" exited on the top. What I should do?
Shawn Harrison, modified 8 Years ago.

RE: How to obtain D3d GUI

Padawan Posts: 70 Join Date: 6/25/12 Recent Posts
Yeah, I got that message too. There seems to be a problem with the permissions your account has for the oss website.

You should email Adri at - He can sort you out. Just explain to him your problem and need for the GUI files.

Incidentally, if you did have sufficient privileges to see the "TEMPORARY EXTRA SERVICE" you would find out that there is a link to generate an email request to for the GUI files. They never replied to my request. Send Adri an email (he's great) and CC it to these sales guys.