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



  • BA
    Bilal Ahmed replied 1 Year ago.

    Delft 2 NetCDF

    7 Posts 12991 Views 1 Answer
  • DK
    Daijiro Kobashi replied 7 Years ago.

    an compiling error (/usr/bin/ld can't find -lfl)

    5 Posts 10772 Views 1 Answer
  • RG
    Ricardo Guerreiro replied 7 Years ago.

    building from the source code

    17 Posts 10514 Views 2 Answers
  • Jonathan King replied 3 Years ago.

    Are there any instructions for the source code files?

    8 Posts 8001 Views 4 Answers
  • Adri Mourits replied 7 Years ago.

    pthreadVCE2.dll issue

    2 Posts 6382 Views
  • Adri Mourits replied 7 Years ago.

    Support on running models

    21 Posts 38185 Views
  • Arjen Luijendijk, modified 7 Years ago.

    Any suggestion for the webportal are welcome

    1 Post 3827 Views
  • Adri Mourits replied 4 Years ago.

    Delft3d Parallel Running

    18 Posts 24061 Views 5 Answers
  • U
    Pim Witlox, modified 8 Years ago.

    Arabian Canal

    1 Post 3281 Views
  • U
    Pim Witlox, modified 8 Years ago.

    Panama Simulation

    1 Post 4135 Views
  • Fedor Baart replied 7 Years ago.

    Delft3D under OSX

    12 Posts 14527 Views
  • Erik de Goede, modified 8 Years ago.

    Importance of open source and initiatives from the European Commission

    1 Post 3172 Views
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