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

Importing irregular grid to QUICKIN

Arisa Ruangsirikulchai, modified 3 Years ago.

Importing irregular grid to QUICKIN

Youngling Posts: 1 Join Date: 6/20/17 Recent Posts

I am trying to import an irregular grid ( to QUICKIN to generate bathymetry. However, it seems like the program only allows me to import a regular grid (.grd). I tried converting the irregular grid to regular grid in RGFGRID but failed. I also tried to save the irregular grid as .grd but failed.

Is there a way to import an irregular grid into QUICKIN? I am using Delft3D 4.01.00.

Thank you in advance,

Arisa Ruangsirikulchai
Erik de Goede, modified 2 Years ago.

RE: Importing irregular grid to QUICKIN

Youngling Posts: 13 Join Date: 1/7/11 Recent Posts

Dear Arisa,

QUICKIN can only generate a bathymetry for a structured grid (*.grd). For unstructured grids we have the Spatial Editor in the DeltaShell GUI of D-Flow Flexible Mesh. See Appendix G in the D-Flow Flexible Mesh User Manual. So, you have to switch to the DeltaShell GUI (instead of using QUICKIN).


With kind regards,

Erik de Goede