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 coupling wave and flow .

Thread Started By Replies Views Last Post  
bed shear stress in shallow waters Rachel Allen 0 711
*** ERROR: Unable to open file SWANOUT2 A D 0 1823
Steep slope from deep water to coastline Hanieh Mohamadi Moghadam 0 2892
VERY slow computation! Erin King 0 675
FLOW-WAVE coupling problem Hafizur Rahman 1 1336
Coupled Flow-Wave models stop after a single time step Ryan Waldron 1 1223
Standalone wave model/ coupled with FLOW Jonathan Ray Abat 7 4764
problem coupling waves and flow Mallory Barkdull 0 2172
Delft3D WAVE with 2D Spectra boundary forcing commands Robert Jenkins 0 1475
Obstacle in GUI SEYED MOIN MOJABI 3 2844
Online Wave Computation Stalling Without Error Messages Ismael Xique 0 1636
Coupling WAVE and FLOW: extend or do not extend? Paolo Gyssels 1 2341
Showing 1 to 13 of 13 entries.