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 d3d-wave .

Thread Started By Replies Views Last Post  
file 'norm_end' expected to signal a correct swan calculation George Victor 0 967
Delft 3D-WAVE output lin liu 0 564
Keywords of vegetation map and file in mdw (WAVE) file? Gabriel Ruiz 3 2318
VERY slow computation! Erin King 0 747
error during wave alone simulation, 2 different boundary conditions (TPAR) George Victor 2 1524
Diffrent Visualization of the same grid file in Flow and Wave modules Fuchun Lai 7 5632
wave alone simulation with only meteo file as input George Victor 3 2281
Issues with D-Waves Peter Egli 2 2231
Delft3D WAVE with 2D Spectra boundary forcing commands Robert Jenkins 0 1568
How to change whitecapping settings Hannah Snow 1 2274
Wave (standalone) non-stationary output for curves Norman Dreier 0 2119
Coupled D3D-FLOW/WAVE: Wave spectra error in nested wave model Ruairi MacIver 1 3779
Non-stationary Delft3D issues Julia Hopkins 1 2797
Time-varying BC in Delft3D-Waves: wavecon vs *.BCW Ruairi MacIver 7 6916
wavecon wave spreading and water level Fajar Khaedir 1 3158
Delft3D-WAVE: Wind forcing quirks Ruairi MacIver 0 1924
Coupled D3D-FLOW/WAVE: Hot restarts Ruairi MacIver 3 4406