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

example batch file for running Delft3D-FLOW parallel

Bart Grasmeijer, modified 7 Years ago.

example batch file for running Delft3D-FLOW parallel

Youngling Posts: 5 Join Date: 3/24/11 Recent Posts
@ echo off
rem This script runs Delft3D-FLOW parallel

set argfile=config_flow2d3d.ini

rem Set the directory containing ALL exes/dlls here (mpiexec.exe, delftflow.exe, flow2d3d.dll, mpich-dlls, DelftOnline dlls etc.)

set exedir=c:\Delft3D_OS\w32\flow\bin\

set PATH=%exedir%;%PATH%

rem Run
rem start computation on local cores (2 for dual core; 4 for quad core etc.):
mpiexec -n 2 -localonly deltares_hydro.exe %argfile%

Jack Teo, modified 3 Years ago.

RE: example batch file for running Delft3D-FLOW parallel

Youngling Posts: 21 Join Date: 6/15/15 Recent Posts
Hey dude,

Thanks for posting this up.

Just a quick question though. I am a noobie in command prompt and I wonder how do I use this script?

Anyone mind giving me a guide?

Much thanks for all the help guys. emoticon
Adri Mourits, modified 3 Years ago.

RE: example batch file for running Delft3D-FLOW parallel

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

When you download a recent version of the source code, example testcases will be included, containing batch scripts (*.bat for Windows, *.sh for Linux). Check that the paths in the script point to exisiting directories, containing the executables. Then execute the script by double-clicking in a browser.