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

gui installation

Kyssyanne Oliveira, modified 6 Years ago.

gui installation

Youngling Posts: 13 Join Date: 9/4/13 Recent Posts
Hi users,

I finally get to install with success the version Was 87 succeded, 0 failed, 0 up to date, 0 skipped. The 5 examples are work fine.
I installed teh gui too, but i don't get to open a example with the gui. All utilities are working fine (apparently), but the example don't open.
Appear a window saying: "Switching to other directory not allowed here. Please, stay in current directory and try again." But I install the gui on D: and downloaded and compiled the open sorce code on C:.
What I have to do???

Alireza Gh, modified 6 Years ago.

RE: gui installation

Youngling Posts: 7 Join Date: 3/2/13 Recent Posts
Hi Kyssyanne,

before starting simulation you need to select working directory (path in which the example files exist)