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

Almost unattainable Compiler Forum

Giordano Lipari, modified 5 Years ago.

Almost unattainable Compiler Forum

Youngling Posts: 12 Join Date: 3/23/11 Recent Posts
A Compiler Forum does exist at (as pointed to by from the README.txt in the src directory) but it is not specifically linked to by any menu in the webpage -- or, at least, not prominently if I'm wrong with that.

No surprise that it is hardly attended. Yet it would be a very useful resource to have at hand to benefit from cumulative collective experience (I'm not very happy with the search engine performance, I shall confess).

Would it be possible to create a link to it in the lists of forums and sub-forums upfront? Thanks for considering this.

Adri Mourits, modified 5 Years ago.

RE: Almost unattainable Compiler Forum (Answer)

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

Unfortunately this does not work. The url you mentioned, including id specification, does not point to the correct thread on my system (anymore?).


Ben Williams, modified 5 Years ago.

RE: Almost unattainable Compiler Forum (Answer)

Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts

The link Giordano mentions works for me.

For example the thread at:

It would be good to have a forum specifically for compiling issues as likely many people who post on this forum in general would find answers to their questions.

Best regards,

Adri Mourits, modified 5 Years ago.

RE: Almost unattainable Compiler Forum (Answer)

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

I added 2 sub categories in the general group.

Hope this helps a bit.


Heather Becker, modified 4 Months ago.

RE: Almost unattainable Compiler Forum

Youngling Posts: 13 Join Date: 6/10/20 Recent Posts
Thank you for sharing the great work that coastal systems are doing right now. If you do some uncensored search right now, you'll find that some of these systems are going to be beneficial for the environment.