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


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Threads with tag installation .

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Compilation on Ubuntu 18.10 Clemens Klante 16 9771
Successfully installed and run Delft3d on Amazon AWS Ubuntu 16.04 (EC2) Paul Liu 2 2055
Quickplot output argument error Iris Verboven 2 4964
d_hydro.exe not found Mukarramah Yusuf 8 3653
Installation on Windows Vitor Silva 1 1514
Received 64 bit installer for 32 bit pc Esther Espinoza 4 2692
Missing create_config_xml.tcl Kristian Kumbier 1 1598
Errors at first step of Linux compilation Geoff Johnson 4 3471
Compile error on Linux Prashansa Madison 1 2436
Install DElft3D on Ubuntu 12.04 Kyssyanne Oliveira 1 3895
Linux GUI install Drew Ackerman 12 11426
GUI installation not working Thomas SAILLOUR 1 2295 Ken-ichi Nomura 2 1883
Building NetCDF libraries for DFM installation on LINUX Santosa Putra 4 6634
Autoreconfig failed Prashansa Madison 1 2413
Make file error Selwyn Bergman 0 1285