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 discharge .

Thread Started By Replies Views Last Post  
Location of discharge open boundaries Ewan Sloan 0 95
Multi-discharge with MorMerge Wolfgang Schanderl 0 214
How to use Culvert type 'u' properly Andi Afif 0 311
Problems with .tim file - substance discharge FLOW and WAQ José Rafael Cavalcanti 10 5698
uniform waste load at bank James Bishop 1 1862
How is momentum treated with culverts? Nejc Coz 0 4811
i don't understand that the maening of the 'discharge' in waq modelling. Anonymous 1 2085
Specifying temperature at outflow discharges Todd DeMunda 1 2299
Concentration in FLOW: Pollutants and tracers Miguel Reyes 7 6488
Flow Adjustment Time James Neher 0 1710
Simulating waste water discharge in Delft3D-FLOW Maja Wanstrom 2 4348
Time Unit in DFLOW FM Santosa Putra 2 120