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

Debugging the source code with the working directory defined

Michael Clarke, modified 5 Years ago.

Debugging the source code with the working directory defined

Youngling Posts: 5 Join Date: 11/11/11 Recent Posts
I am trying to understand the code better and want to debug the source code by specifying the external working directory. Currently, in the overall solution, there are many projects lumped together. For example, I am interested in running the simple 1 D example with a dye activated. I have the compiled executable and required dll separately but I want to run the model in the debug mode. Looking at the code, flow2d3d under engines_gpl looks like the way to move forward but I was unable to run on the debug mode. Any suggestions on debug would be highly appreciated.
Adri Mourits, modified 5 Years ago.

RE: Debugging the source code with the working directory defined (Answer)

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

Sorry, I missed your post.

There is some info about debugging in Visual Studio in file "src/README". Please let me know when this is not sufficient.