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

Problem executing FLOW

Joana Rodrigues, modified 5 Years ago.

Problem executing FLOW

Youngling Posts: 1 Join Date: 10/8/14 Recent Posts
Hello everyone,

I am trying to apply Delft3D for the study of the increasing of the water level in a river in a certain meteorological conditions. I have all the files for the input, but in the end, when I try to run the model, the following error is shown:

'' Starting Delft3D-FLOW computation ...
Deltares, Delft3D-FLOW Version, Aug 23 2011, 18:06:51
flow2d3d.dll entry RUNME

Part I - Initialisation Time Dep. Data module...
runid : teste
Part II - Creating intermediate files...
ABORT: error returned by tdatmain
Flow exited abnormally

JREPATH = C:/Delft3D/w32/plugins/jre\bin\client\jvm.dll

child process exited abnormally''

Could anyone please help me?
Thank you.
Adri Mourits, modified 5 Years ago.

RE: Problem executing FLOW

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

There should be a file named "td-diag.<something>" in your working directory explaining what is going wrong.