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


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Threads with tag part .

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Wind Files on Delft PART Maria Fernanda Mendes Fiedler 0 315
read and write *.flo file for PART Zhanxian Wang 5 2892
DELWAQ-PART:Assigning multiple fractions with different settling velocities Ben Williams 1 2420
Setting up DELPAR (D-Water Quality Particle Tracking) simulation from GUI Ben Williams 6 7915
Disk write frequency in delft-part Stephen Green 1 2178
Delft3D PART(oil) issue with sticking (beaching) Eric Nardi 1 3387
Delft3D PART(oil) issue with sticking (beaching) Eric Nardi 1 3387
D-WAQ PART - Changing the number of threads gustavo gomes 2 3020
D-Part module status Hailiang Shen 5 4260
Decay rate in PART program. Masaaki Sato 4 5061
Particle Tracking open source? How to use ? Onur Kurum 1 4043