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

Grid manual

Jon Hubertz, modified 8 Years ago.

Grid manual

To start Delft3D:
? On an MS Windows platform: select Delft3D in the Programs menu.

How do I get to the programs menu? This is in Chapter 3 of the grid manual.
Bert Jagers, modified 8 Years ago.

RE: Grid manual

Jedi Knight Posts: 201 Join Date: 12/22/10 Recent Posts
Hi Jon,

What is meant by this statement is the standard Programs menu of Windows.
The exact name will depend on the Windows version that you're using.
On my Windows XP machine it means:

  • Click on Windows "Start" button; usually in the lower-left corner of the screen.
  • Move the pointer to "All Program"; a list of all software installed will open.
  • Then move the pointer to the "Deltares" item in the list; a list of Deltares software installed will open.
  • Then move the pointer to the "Delft3D" item in the list; another submenu will open.
  • Then select the "Delft3D" (marked with white D on black background).

Best regards,