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

Activating temperature and salinity calculation in Linux

Nicholas Herold, modified 2 Years ago.

Activating temperature and salinity calculation in Linux

Youngling Posts: 6 Join Date: 3/26/17 Recent Posts
Hi, can anyone tell me how to turn on temperature and salinity calculations for FLOW in Linux (i.e. without the GUI). I assume anything possible in the GUI is possible without it. I haven't seen anything in the manual about doing this outside the GUI.

Qinghua Ye, modified 2 Years ago.

RE: Activating temperature and salinity calculation in Linux

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Nicholas,

It is quite troublesome/tedious to change all things in the corresponding files. To add salinity and temperature, you need to update the SUB1, and coresponding initial conditions, in mdf file. And you should update boundary conditions, bcc file, and maybe dis file as well. My personal opinion is, though it is possible, for efficiency point of view, to use the windows GUI to setup model is more efficient.