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

64 Bit Windows

Jason Engle, modified 9 Years ago.

64 Bit Windows

I am considering setting up Delft3D on a machine that runs 64 Bit version of Server 2003. Are there any known issues with pre- or post-processing tools or with model compiling, etc on 64 bit Windows machines?

Thank you in advance for any experience/input that you may provide.

Adri Mourits, modified 9 Years ago.

RE: 64 Bit Windows (Answer)

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

Currently, I use a 64 bit Windows 7 machine with Visual Studio 2010 and Intel 12.0 Fortran compiler. I added a separate solution (deltares_hydro_open_source_vs2010.sln) and separate projects for VS 2010. It works fine, although I did not run our complete testbench with it yet.