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 .

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Failed to compile source code Sumiaya Amin Preota 0 535
Compiling Delft3dfm Windows Adnan Rauf 0 273
Unable to compile Huy Tran Quang Pham 0 489
ir_precision.mod created by a different version of GNU Fortran Robert Diersing 1 759
Compilation on Ubuntu (tag 59821): deltares_common_version_module Sebastian Krieger 4 3220
Changing the Sediment Transport Routines Seyed Moin091 Mojabi 1 1306
compilation errors - windows *new attachment Nathan Cheshier 2 3840
MPI Linking error in Delwaq2 James Tomlinson 45 38165
Errors Compiling Delft3D on Windows 7 Chris C 2 3015
configure: error: Compiler can't find <expat.h> Selwyn Bergman 2 12645
Compiling and Parallel run question Jeff Hansen 6 4646
Error - Delft3D install ./ Drew Mahedy 1 2364
Make install mpi.mod error Drew Mahedy 1 7726
Compiling the trunk - issues and suggestions (Linux) Bogdan Hlevca 1 1867
Error Compiling Error LNK1123 Steven Micko 4 6333
Different results using Delft3D-FLOW version yun lang 15 9732 undefined reference to .... (Linux) Thomas Boyington 11 7138
compiling problems using Windows 7 and Intel Composer XE 2013 Johanna Sucher 7 8897
System cannot find the file Nuria Perez Luis 3 2997