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

Qs about parallel run: "reading complete MD files"

K Liu, modified 6 Years ago.

Qs about parallel run: "reading complete MD files"

Padawan Posts: 48 Join Date: 10/23/13 Recent Posts
Dear all,

I have just set up a flow wave coupled model, but run into a wiered problem. If I run this model in serial mode, it is running fine; but when I put it on multiple cores, e.g. 4 cores, the model stuck at "Part VI. Reading complete MD- files", taking forever at that step, which means it fails to read the input or start simulation.

Since it doesn't report any error message, I have no idea what is wrong in my input files. Could any one share some experience what to check and how to figure out the problem?

Andrea Cimatoribus, modified 3 Years ago.

RE: Qs about parallel run: "reading complete MD files"

Youngling Posts: 4 Join Date: 3/8/16 Recent Posts
Having the same problem here, only when using the executable from intel compiler (code version 6118).