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

Which option to compue cell centre values should I use? (Flow module)

Esther Espinoza, modified 2 Years ago.

Which option to compue cell centre values should I use? (Flow module)

Padawan Posts: 25 Join Date: 4/6/17 Recent Posts
Hi, I hope you can help me with this. I'm new with delft3d but I'm using the flow module to model water level, my study area is an estuary. I made the grid and save the dep file but I didn't do it at the cell centers. I mean, when I made the interpolation I never choose grid cell centers, I just finished the whole interpolation and save the dep.

So now on the flow module (Domain-Bathymetry) I should choose the option "Values specified at Grid cell corners" right? Then, I'm not sure which of the three options :Max, Mean or Min to choose for "Cell centres values computed using" should I use. Which of these options would be the best for my type of study area?

Or maybe I can change the dep saving it at the grid cell centres without doing the whole interpolation again on Quickin?

Sorry if this is too obvious to ask. Thanks!

amr salama, modified 2 Years ago.

RE: Which option to compue cell centre values should I use? (Flow module)

Youngling Posts: 12 Join Date: 9/16/15 Recent Posts
Hi Esther Espinoza

I am interested in modeling hydrodynamics in an estuary which could resemble your case. for " Values Specified at " I have selected " Grid Cell Corners " and for " Cell Center Values Computed Using " i have selected " Max " . it works fine with me.