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

Tide analysis tool

Gurunoorthi K, modified 7 Months ago.

Tide analysis tool

Youngling Posts: 2 Join Date: 10/11/17 Recent Posts
Dear friends,
I have used delft3d-Flow-tidal too to separate the tide and residual tide. For this analysis, I have extracted IHO tide data and tidal constituents from dashboard (station name: Chennai) for the period of 01/12/2016 (one month).
I analyzed that same observation data, but constituents and phases are not same after analysis. I should get same Constituents and phase since i am using dashboard and delft tide analysis.
1) What is the reason? why it is showing difference? Is that IHO tide is pure tide? if it is pure tide, there is no point of splitting again. This may be the reason for this difference.
2) In .red file, there are 6 rows. What it means? since i give one observation data in one row, i should get only one residual tide in one rows. Please explain about the rows in .res and .hdc files.

I have attached all the files for your reference. Please reply....
Thanks advance.