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



  • SL
    Sha LOU replied 5 Months ago.

    Curvilinear Grid - Define spectral files

    3 Posts 3202 Views 1 Answer
  • Fernando Barreto, modified 5 Months ago.

    All boundaries with current type boundary condition

    1 Post 169 Views 0 Answers
  • SN
    Shereen Nazer, modified 5 Months ago.

    sample plotting in QUICKIN

    1 Post 173 Views
  • Oliver Lojek replied 5 Months ago.

    "Error in mclFreeStackTrace" Quickplot

    4 Posts 959 Views
  • JR
    joe rahi, modified 5 Months ago.

    Delwaq input file

    1 Post 231 Views
  • BJ
    Braulio Juarez, modified 5 Months ago.

    Delft3D running without parallel option but not running in parallel

    1 Post 140 Views
  • AM
    Alexandra Grace McInturf, modified 5 Months ago.

    Installation of the Delft3D GUI

    1 Post 179 Views
  • AM
    Alex Mcinturf, modified 5 Months ago.

    GUI installation issue

    1 Post 176 Views 0 Answers
  • YL
    Yuanyi Li, modified 6 Months ago.

    Want a example of file for temporal and varying wind field for Flow

    1 Post 184 Views
  • LC
    Liang Chen, modified 6 Months ago.

    Promgraming error

    1 Post 155 Views
  • SS
    Samuel Schroers replied 6 Months ago.

    Neumann Boundary Condition

    3 Posts 1378 Views 0 Answers
  • CF
    Chris Flanary, modified 6 Months ago.

    Sediment variables in NetCDF history file all 0

    1 Post 160 Views
  • XW
    Xiaohui Wang replied 6 Months ago.

    PetscInitialize() must be called before PetscFinalize() (SOLVED)

    3 Posts 625 Views
  • Qinghua Ye replied 6 Months ago.

    without delft3d.sh in Ubuntu

    2 Posts 270 Views
  • SS
    Suraj Singh replied 6 Months ago.

    Boundary conditions

    9 Posts 5856 Views
  • Germán Aragón, modified 6 Months ago.


    1 Post 201 Views
  • Samuel Valentim replied 7 Months ago.


    11 Posts 4384 Views 1 Answer
  • IM
    Irene Machado, modified 7 Months ago.

    getting .xyz file

    1 Post 198 Views
  • YL
    Yuanyi Li, modified 7 Months ago.

    How to determine the connection of segments in Delft3d-WAQ

    1 Post 164 Views
  • FP
    Frank Platzek replied 7 Months ago.

    numerical instability in domain decomposition with inclined bathymetry

    2 Posts 475 Views
Showing 81 to 100 of 1,119 entries.