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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Question For Delft3D-Flow

WONHYUN LEE, modified 3 Years ago.

Question For Delft3D-Flow

Youngling Posts: 2 Join Date: 1/7/15 Recent Posts
Hello, Guys~

My name is Wonhyun Lee, now I am interested in Cyclone model, but I have a big question for that.

In particular, for the evaporation and precipitation rate.

well, normally, Delft3D-Flow provides the XXX.eva (additional parameter : Fileva ;#XXX.eva#) files to apply it.


I would like to apply the spatial-temporal varying evaporation and precipitation rates into the model.
For example, if the cyclone is moving and landfalling to some area,
normally lots of rainfalls is accompanied with a hurricane.

So, could you please let me know, 'spatial-temporal varying evaporation & precipitation rates are available for Flow model?
any tips for input files (evaporation and precipitation rates)
or is there any option that evaporation & precipitation rates are included with a hurricane?

Have a great day.