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

New Version Problem

Md Bin, modified 6 Years ago.

New Version Problem

Padawan Posts: 42 Join Date: 12/17/12 Recent Posts
Recently I try to download new version. When I try to run a .mdf file there show a message
did not run successfully Message is copied to d3d_menue.msg

what is the problem .
Arthur van Dam, modified 6 Years ago.

RE: New Version Problem

Youngling Posts: 7 Join Date: 3/3/11 Recent Posts

Your problem almost surely concerns Delft3D-FLOW. You've accidentally posted your question in the Delft3D-Flexible Mesh subforum, which is a different program.
I've asked an admin to move your question to the appropriate forum group.
Adri Mourits, modified 6 Years ago.

RE: New Version Problem

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Md Bin,

Are you able to run the examples inside the source code using a batch file? Can you run them with the User Interface? Is there a tri-diag-file with some information about what goes wrong?