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

Domain Decomposition Simulation Batch File

Clinton Chrystal, modified 8 Years ago.

Domain Decomposition Simulation Batch File

Youngling Posts: 7 Join Date: 11/26/12 Recent Posts
Hi all.
Trust everyone had a good festive season break.

I am trying to set up my first domain decomposition run.

Scenario: Running a simulation on an estuary with 2 grids (one placed inside and one outside). At the interface, I have used a domain decomposition approach.

I have tried to set up a batch file (see attached), but not having success in getting it to run.

Would some please have a look and provide some feedback on the file, and if possible, please share a batch file of yours that is running, so I can go through it to check for errors in mine. When I try to execute the file (having tried several approaches), it fails.

It is my first attempt at running a DD simulation, so I may have made some rookie mistakes (even though I have read most of the threads and applied the information found in the threads and manuals as best I could – such as running the mdf files separately, how to create the grids etc…).

I am also unsure of how and what the setup involved is for the delftflow.inp file, or if it is correct.

Many thanks for the assistance and time to help.
Have a good day,
Adri Mourits, modified 8 Years ago.

RE: Domain Decomposition Simulation Batch File

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Clinton,

Having downloaded the source code, example 2 contains run scripts for a DD simulation (one for Windows and one for Linux). After compiling the source code (release version), this script should run without any copying around of binaries.