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

FLOW-WAVE coupling problem

Hafizur Rahman, modified 2 Years ago.

FLOW-WAVE coupling problem

Youngling Posts: 5 Join Date: 4/4/17 Recent Posts

I am trying to set up a trial model for my project using FLOW-WAVE coupling.i had followed the steps provided in the WAVE manuals.While running the simulation some meassage appeared and the simulation seems to hang at initial state for about 3 hours.. i have attached two pictures of the message and the place where simulation hanged.

here are some lines from flow dianosis file

*** WARNING Latitude of your model is 0 degrees, model located at equator
*** WARNING MAP stop time outside simulation period; will be reset
*** WARNING HIS stop time outside simulation period; will be reset
*** WARNING Comm. stop time outside period for writing file; will be reset
Creating new trih-stMartin-1.dat
Creating new trih-stMartin-1.def
Creating new trim-stMartin-1.dat
Creating new trim-stMartin-1.def
*** MESSAGE Nodal factors updated at 2016-03-02 **:**:**.0000
NEFIS message 6004:
Group 'WAVNT ' does not exist in data file
Adri Mourits, modified 2 Years ago.

RE: FLOW-WAVE coupling problem (Answer)

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Hafizur,

Please have a look at the FAQ.