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 source code .

Thread Started By Replies Views Last Post  
The question of where to find the source code of windgrowth Chenhui Wu 1 527
Where can I find source code for reference concentration? Gabriel Lim 0 91
Variables "sour" and "sink" in heatu.f90 Mitya Menshikov 0 1732
Bank erosion Dmitry Kushnir 4 7758
Source code of calculate temperature Mitya Menshikov 4 1315
Source code of calculate temperature Mitya Menshikov 4 1315
Error compiling Delft3D source code VS 2017 and IFORT18 Pietro Mazzon 15 12438
Time-Variable Porous Plate Implementation Marcelo Gagliardi 0 636
Access denied when downloading source code Daniel Kitchener 1 2787
Equilibrium concentration of non-cohesive at boundary-Source code Zhina mohammed 2 3870
Changing the Sediment Transport Routines Seyed Moin091 Mojabi 0 863
Running Delft 3D in Parallel Jonathan King 4 4135
Number of open boundaries too large Jonathan King 4 3264
Version numbering Moritz Lehmann 1 1949
NaN in RHS segment after editing pripro.f in waq kernel Rudy Schueder 2 3082
Error .vfproj opening source code with ftn95 Bram Schnitzler 1 2403
User defined output in u_ppr (user postprocessing) subroutine Michael Clarke 1 2314
Help whit Manning Coefficient Reinaldo Barriga 3 3502
Running error GUI 4.01 Ivana Bosnic 4 2928
Delft3d Compilation Error | MPI 1.4.1 Oliver Lojek 1 1848
Showing 1 to 20 of 20 entries.