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

pre-comipled version

Feleke Arega, modified 8 Years ago.

pre-comipled version

I got the pre-compiled version of Delft3D. However, after installtion the program did not find d_hydro.exe and deltares_hydro.exe files in the bin directory. I apprecaite your help in resoving this issue.
Fernando Barreto, modified 8 Years ago.

RE: pre-comipled version

Padawan Posts: 74 Join Date: 6/21/12 Recent Posts
You have to compile the code (, for example) to generate the executables (d_hydro.exe and deltares_hydro.exe). After compilation will be generated the folder win32. Than you have to executate the program convert_win32_to_old_directory_structure_w32 to transform to folder win32 to w32. The folder w32 must be coppied to the directory of delft3d GUI.