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

Version of Delft3D

Ali Khoshkholgh, modified 5 Years ago.

Version of Delft3D

Youngling Posts: 19 Join Date: 6/23/12 Recent Posts
Hi all,
I have read some reports that showed, there are some other versions of Delft3d(Open Source Code) which i could not find them from the Delft3D Open Source Community site(For example : delftflow version is appreaciated if anyone could help me
I would appreciate if someone can help me find these versions.
Best Regards
Adri Mourits, modified 4 Years ago.

RE: Version of Delft3D

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

Delft3D went (partly) open source on January 1st, 2011. The first release, Delft3D 4.00.00, contains Delft3D-FLOW version All older Delft3D and Delft3D-FLOW versions are closed source, including Delft3D-FLOW

If you want to obtain a closed source version, please mail your request to sales.