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



  • PG
    Paolo Gyssels replied 3 Years ago.

    Coupling WAVE and FLOW: extend or do not extend?

    2 Posts 2002 Views 0 Answers
  • Rudy Schueder replied 3 Years ago.

    Numerical instability caused by Q-H boundary?

    2 Posts 2863 Views 0 Answers
  • Adri Mourits replied 3 Years ago.

    Problems running 5169 examples

    2 Posts 2019 Views
  • Qinghua Ye replied 3 Years ago.

    Delft3D-FLOW Parallel Computation Error

    2 Posts 2730 Views 0 Answers
  • SW
    Simon Waldman, modified 3 Years ago.

    Confusion over bed roughness formulations in 3D

    1 Post 1183 Views 0 Answers
  • Erik de Goede replied 3 Years ago.

    Error with Time series in Domain Decomposition models

    3 Posts 1909 Views
  • Adri Mourits replied 2 Years ago.

    Error while running wave using equidistant_wind with nesting

    3 Posts 2768 Views 1 Answer
  • Qinghua Ye replied 3 Years ago.


    3 Posts 2554 Views 0 Answers
  • MH
    Mark Huisjes replied 3 Years ago.

    Grid generation in many subbasin scenario

    3 Posts 1850 Views 0 Answers
  • RP
    Renan Pointeau replied 3 Years ago.

    Can Delft-FLOW have muti-processing?

    3 Posts 1937 Views
  • Qinghua Ye replied 3 Years ago.

    Bottom roughness(manning) and viscosity/diffusity

    2 Posts 2755 Views 1 Answer
  • Adri Mourits replied 3 Years ago.

    best subversion tag

    4 Posts 3641 Views 2 Answers
  • Qinghua Ye replied 3 Years ago.

    flow simulations with "Closure error"

    2 Posts 1221 Views 1 Answer
  • DM
    Dina Makarynska replied 3 Years ago.

    tclkit is not responding

    3 Posts 1948 Views 0 Answers
  • Adri Mourits replied 3 Years ago.

    Errors Compiling Delft3D on Win8.1 (64-bit)

    2 Posts 2568 Views 1 Answer
  • Vasudevan shankar replied 10 Months ago.

    Delft3d - TIDE Issue

    5 Posts 4016 Views 1 Answer
  • RD
    Robert de Boer replied 3 Years ago.

    Read ADCIRC output file (.63) in Matlab?

    2 Posts 2482 Views 0 Answers
  • Adri Mourits replied 3 Years ago.

    Error Documentation/List

    2 Posts 2127 Views
  • Rudy Schueder replied 3 Years ago.

    Order of boundary specification

    5 Posts 2266 Views 1 Answer
  • JM
    Jos Muller replied 11 Months ago.

    online delft3d flow and swan coupling

    8 Posts 3933 Views 2 Answers
Showing 321 to 340 of 1,100 entries.