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


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Threads with tag delft3d .

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Merging com*.dat file for delf3d flow wave offline coupling shanas pr 0 39
converting .nc format to .wnd umutcan inal 0 21
Converting .nc file to .wnd file Dogukan Karakas 0 19
How do we make essential .exe files (eg. d_hydro.exe) to run tutorials sivaiah Borra 0 27
symmtery in hydrodynamic input data and asymmetry in morphology output Hanieh Mohamadi Moghadam 0 347
numerical instability in domain decomposition with inclined bathymetry Markus Gross 1 899
Vertical 3D profile not allowed - nesting DELFT3D boundary with values Seth Jelen 1 1959
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f951: error: unrecognized command line option "-fpp" on RHEL 6.6 KRIS Zh 4 5937
Tsunami simulation connecting Delft3d results and XBeach Pietro Mazzon 0 2162
The never ending story with NETCDF - A guide for linux compilation Giovanni Besio 1 1700
Impose discharge limit in a Culvert karunakar kintada 0 1254
DELFT3D-TIDE HILOW question Niño Jhim Andrew Dela Luna 1 1366
Future estimation Mathanki Sivapatham 0 1686
Medium-term Modelling using delft3d (stationary or non-stationary) Ruchira JAYATHILAKA 8 6907
Delft3D Linux documentation Margarita Tan 0 872
OpenEarthTools - examples and routines João Paulo Ferreira 0 1371
calculating FRACTIONS in delft3d/delwaq James Bishop 2 2344
Coupling point error Hadiseh Bolkhari 0 2300
Using Delft3D as 2DV for beach profile evolution Ben Williams 0 2387
Showing 1 to 20 of 87 entries.