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


Message Boards

Threads with tag windows .

Thread Started By Replies Views Last Post  
Compiling on Windows: flex.exe and byacc.exe was unable to start correctly Marjorie Turiano 12 11745
Compiling v6118 in Windows 10 K Liu 5 4210
PETSc on Windows Adri Mourits 2 4674
compiling problems using Windows 7 and Intel Composer XE 2013 Johanna Sucher 7 8361
Compilation on Windows: general remarks Adri Mourits 1 4364
MPI - Running parallel on windows with Delft3D 4.01.00.rc.09 karunakar kintada 6 6095
Compiling and Parallel run question Jeff Hansen 6 4040
Delft 3D | Parallel.bat on a Quad-Core Windows 7 64-bit Oliver Lojek 11 8770
Multiple Simulations Oliver Lojek 5 5484
Error reading grid file on Linux francisco tiano 20 11113
'make' error Yi Lin Leong 2 2282
Problems with the GUI Mihael Souza 12 3278
compiling problems using Windows 7 and Intel Composer XE 2013 Johanna Sucher 7 8361
Installing compiled version of Delft3D (windows) on a different pc Stephan Creelle 2 3518