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



  • Adri Mourits replied 1 Year ago.

    Hydro.exe missing

    2 Posts 855 Views 0 Answers
  • VM
    Vahid Mohammadian replied 1 Year ago.

    svn checkout failed

    3 Posts 977 Views 0 Answers
  • Adri Mourits replied 1 Year ago.

    License Expired & program error

    4 Posts 1131 Views 0 Answers
  • Qinghua Ye replied 1 Year ago.

    Thatcher-Harleman boundary conditions

    4 Posts 2059 Views 1 Answer
  • Adri Mourits replied 1 Year ago.

    temperature below 0°C and above sea water freezing point

    2 Posts 612 Views 0 Answers
  • MS
    Mathanki Sivapatham replied 1 Year ago.


    3 Posts 1009 Views 0 Answers
  • Adri Mourits replied 1 Year ago.

    Executable file not found (d_hydro.exe)

    4 Posts 1613 Views
  • KN
    Kees Nederhoff replied 2 Years ago.

    Problem access to the OpenDAP servers with Dashboard

    2 Posts 992 Views 0 Answers
  • ET
    Emanuele Terrile replied 1 Year ago.

    Screen output

    3 Posts 866 Views
  • Fernando Barreto replied 2 Years ago.

    Baroclinic simulation with sigma layers

    3 Posts 1556 Views 1 Answer
  • Adri Mourits replied 2 Years ago.

    Compilation error: Can't find module file 'mpi.mod'

    2 Posts 3305 Views 1 Answer
  • Adri Mourits replied 2 Years ago.

    waterbalance does not add up

    2 Posts 654 Views
  • U
    Anonymous, modified 2 Years ago.

    Converting kml2ldb

    1 Post 472 Views 0 Answers
  • VF
    Violeta Fernandez replied 1 Year ago.

    ? problem while Installing GISVIEW module of Delft3D

    2 Posts 961 Views
  • CB
    Claire BERAUD replied 2 Years ago.

    3D mesh -combining Z and sigma layer

    3 Posts 1000 Views
  • Adri Mourits replied 1 Year ago.

    Segmentation violation when testing compiled executable

    5 Posts 1584 Views 0 Answers
  • Adri Mourits replied 2 Years ago.

    non-hydrostatic z-level and parallel

    2 Posts 847 Views 1 Answer
  • Michelle Jeuken replied 2 Years ago.

    bloominp.blm growing to 400 GB in Size!!!

    2 Posts 854 Views 0 Answers
  • Adri Mourits replied 2 Years ago.

    Delft 3D FLOW Model current outputs

    2 Posts 1018 Views 1 Answer
  • RS
    Rinse Swart replied 2 Years ago.

    Implementing culvert type 'u' with Delft3D flow tagged version 6075

    5 Posts 1177 Views 2 Answers
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