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 windows 7 .

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Build Error Shantanu Vidyadhar Bhide 1 2039
Error 10310 compiling tag 6118 Lucas Storto 0 1061
Mysterious Simulation Abort Dave Ortiz-Suslow 1 1466
Support debugging DELFT3D (VS8 Fortran11.1) Alessandra Casari 1 1391
Errors Compiling Delft3D on Windows 7 Chris C 2 2762
Delft-3D | Windows 7 | Missing NestHD 1 & 2 Routines Oliver Lojek 1 3061
Compiling issues again Ed Atkin 5 2967
Delft 3D | Parallel.bat on a Quad-Core Windows 7 64-bit Oliver Lojek 11 8537
Compiling | Revision 3020 Tag | VS 2008 + iFort 11.1 Oliver Lojek 6 3770
Error reading grid file on Linux francisco tiano 20 10882
Problems compiling Delft3D on windows Constanzo Marullo 9 17852