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 initial conditions .

Thread Started By Replies Views Last Post  
.ini file Anonymous 0 6
.ini file Anonymous 0 10
Initial conditions for WAVE? Dmitry Kushnir 3 1695
z-layer initial condition specification (Delft3D 4.02.03) Kevin Hanegan 0 2649
Estuary model - unstable downstream boundary Jan Tiede 3 1707
Estuary model - unstable downstream boundary Jan Tiede 3 1707
Initial Condition Mathanki Sivapatham 0 1831
map-file time inconsistency Jacob Morgan 1 3652
simulation restart Jacob Morgan 2 1912
no water in the upper river Zheng Jiechen 4 2882
Boundary Conditions on a River Juan Arellano 2 3615
Coastal model Dissolved Oxygen (DO) boundary & computational issue Danker Kolijn 1 2974
Tidal water level variation inside an estuary Saeed Shaeri 3 3837
Second "Initial" Condition in Delft3D Flow Jan Oetjen 0 1587
How to create initial conditions for dam break Shawn Sim 3 3309
Problem with small time steps Imke Evers 4 7070
Time varying initial conditions Jeff Wilson 5 3051
Fluid mud Ben Williams 4 4861
RUN A NESTED DOMAIN independently (offline) of the overall domain LUIS HENRIQUE SILVA 1 2197
how to specify the initial conditions file with delft3d-quickin or with som chen ling 2 9912
Showing 1 to 20 of 22 entries.