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 compile error .

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Error LNK2001 when compiling tag version 7545 Mohammed Almoghayer 3 2626
Error message: Improper version of watqual.d3d and proctabl.d3d Michael Ulmgren 4 3417
Linux Compiling Issue Josha Humberston 1 1052
Error in opening the compiled module file error on Linux machine Josha Humberston 1 2110
Example running error Hafizur Rahman 2 1275
io_netcdf_api.F90 compilation error in Ubuntu 16.10 Sebastian Krieger 4 4008
Missing create_config_xml.tcl Kristian Kumbier 1 1641
Error 10310 compiling tag 6118 Lucas Storto 0 1077
Errors running some examples Selwyn Bergman 4 5211
Tagged 5389 Compiling Error Haifeng Tang 4 5470
compiling delft3d error, /usr/bin/ld: cannot find -lnetcdff Dave Ortiz-Suslow 6 6656
compiling delft3d error, /usr/bin/ld: cannot find -lnetcdff Dave Ortiz-Suslow 6 6656
compiling delft3d error, /usr/bin/ld: cannot find -lnetcdff Dave Ortiz-Suslow 6 6656
Error Compiling Error LNK1123 Steven Micko 4 5835
Bug in makefile Bogdan Hlevca 1 1844
Error Compiling Delft3D Linux "cannot have a deferred shape" Mariangel Garcia 0 2481
make ds-install & undefined symbol: MPI_Init LI LI 24 13347
Compilation errors with Steven Douglas 2 2203
compilation Nophi Biton 1 1884
Error Compiling Error LNK1123 Steven Micko 4 5835