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

Windows MPI running Warning

Qi Shen, modified 8 Years ago.

Windows MPI running Warning

Youngling Posts: 1 Join Date: 12/14/12 Recent Posts
Dear everyone :
I have downloaded the Delft3d Version and install the MPI software. when i run the example/01_standard/run_flow2d3d_parallel.bat, I was confused by the warning,says 'Warning Discharge (m,n,k) =(14,2,1) is disable: inlet and/or outfall not in this partition'. Who can tell me what's that warning means? What's wrong with my MPI?
Thank you!
Qi Shan
Adri Mourits, modified 8 Years ago.

RE: Windows MPI running Warning

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Qi Shen,

That is nothing to worry about. When running parallel, the domain is split in several parts, each handled seperately. Each discharge is active in only one partition, depending on its location. The other partitions, in which the discharge is INactive, will produce this warning by default.