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 rgfgrid .

Thread Started By Replies Views Last Post  
Morphological Model Setup | Tidal Flats Anonymous Anonymous 11 10656
grid clicking-failed Ao Chu 5 6698
RGFGRID | Previous Grid Anonymous Anonymous 2 3371
Error reading grid file on Linux francisco tiano 20 12676
Bathymetry shift Moein Doostmohammadi 0 180
RGFGRID Crashes When Merging Irregular Grids - MATLAB Alternative? Robert Jenkins 0 682
Crash using "Attach to Land Boundary" in RGFGRID H Sandberg 6 3050
Grid Edge Lengths Alex Christensen 0 851
Possible bug in RGFGRID after entering "Edit Grid" mode Anton Jesper Jesper Burman 0 854
Grid orientation problem (D3D-FLOW) Yahia Kala 1 1681
Change the origin of the grids on RGFGRID Daijiro Kobashi 0 2049
Delft3D-WAVE invalid gridfile error William Bennett 1 1624
Importing irregular grid to QUICKIN Arisa Ruangsirikulchai 2 3899
Rgfgrid Coordinate System Jules Aficial 3 4258
using dflow fm in quickin Dwi Saputri 0 1569
Merge grid and nodes Dwi Saputri 1 4100
Refine Grid locally for river discharge Lucas Storto 3 6116
Issue with rotating grid administration Maumoon Saleem 1 1584
Issue with rotating grid administration Maumoon Saleem 1 1584
Grid shows differently in FLOW Visualization Area Esther Volmar 2 3866