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

Threads with tag grid .

Thread Started By Replies Views Last Post  
Rotating Grid Administration Jamie Stackpole 0 23
incomplete grid generation ZIXUN ZHANG 0 37
Domain Decomposition,wrong coupling point Farshad Heidarnejad 0 41
Domain Decomposition,wrong coupling point Farshad Heidarnejad 0 60
How to prepare inputs Grid, bathymetry, mesh on linux after install Delft3d sivaiah Borra 0 30
How to convert Grid from WSG84 to UTM coordinate system? Baogan Liao 7 2789
Problems with creation of .cco and .lga files Maria C 2 575
Strange display of grid in FLOW visualization area Benjamin Freudenberg 2 587
Grid format for SWAN. Vector? Nate VanArendonk 0 500
Boundary conditions flow and salinity Esther Espinoza 0 2132
depth to xyz Alejandro Paladio 1 2620
Grid does not display correctly in DELFT3D-WAVE A Yawer 2 1948
Diffrent Visualization of the same grid file in Flow and Wave modules Fuchun Lai 6 5257
Error when creating grid Esther Espinoza 3 3677
Courant number and instability Orpita Laz 7 15959
using dflow fm in quickin Dwi Saputri 0 1283
Refine Grid locally for river discharge Lucas Storto 3 5036
Domain Decomposition Phil Shepperd 1 1699
Develop domain with varying resolution Kristopher Calder 0 613
an error about change spline into grid shi gaochuang 0 2277
Showing 1 to 20 of 39 entries.