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 netcdf .

Thread Started By Replies Views Last Post  
Delft3D4 compilation with VS2019 and OneAPI on Windows 10 - netcdf issues Ewan Sloan 0 323
D_FLOW netcdf output not readable in Python Anne Ton 2 377
Extracting wave results in netcdf format Pedro Otiñar Morillas 0 93
converting .nc format to .wnd umutcan inal 0 195
Converting .nc file to .wnd file Dogukan Karakas 0 223
Getting netCDF as an output of Delft3D-FLOW Changeun Yang 1 276
reading output files without matlab veli yumruktepe 6 15429
Long computation times while writting to netCDF. João Lencart e Silva 4 2187
The never ending story with NETCDF - A guide for linux compilation Giovanni Besio 1 2358
Delft 2 NetCDF Hemerson Tonin 7 16064
Error in opening the compiled module file error on Linux machine Josha Humberston 1 2559
open boundaries Tony Lee 0 977
io_netcdf_api.F90 compilation error in Ubuntu 16.10 Sebastian Krieger 4 4724
Does not compile with either GNU 4.8.3 or Intel 12.1 Jeff Stafford 5 5483
Open a netcdf-4 with Python Antoine Marié 1 2820
Compiling Delft3d in OpenSuse 13.1 Giovanni Besio 10 9506
Compiling Delft3d in OpenSuse 13.1 Giovanni Besio 10 9506
Compiling Delft3d in OpenSuse 13.1 Giovanni Besio 10 9506
Error with datagroups.f90 and netcdf.mod Iñaki Silanes 2 3223
Compiling Delft3d in OpenSuse 13.1 Giovanni Besio 10 9506