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 delft3d matlab .

Thread Started By Replies Views Last Post  
How to use matlab tool vs_let() get the Ux and Uy, not velocity in M and N Anonymous Anonymous 0 4252
RGFGRID Crashes When Merging Irregular Grids - MATLAB Alternative? Robert Jenkins 0 683
Grid Edge Lengths Alex Christensen 0 851
Convert matlab file to a depth file A D 2 2371
underlayers and qpread() Christopher Esposito 0 1578
Help with Matlab and grid cell average of horizontal velocity Guilherme Cruz 2 3840
Landboundary file MATLAB Mathanki Sivapatham 0 3838
Domain Decomposition Phil Shepperd 1 2235
Read ADCIRC output file (.63) in Matlab? Robert de Boer 1 3199
reading water level from NEFIS file using vs_ matlab functions Kevin Hanegan 4 7557
Trouble Opening Delft3D-FLOW trih file in Matlab James Knighton 1 6067
How can I start a simulation from MATLAB, or the DOS prompt? Menno Eelkema 1 2441