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

Threads with tag delwaq - water quality .

Thread Started By Replies Views Last Post  
Delft3d FM Suite Water Quality model _Data import Yao Huiting 0 338
ERROR in GMRES 1 - waq simulations José Rafael Cavalcanti 1 1193
"merging com files ..restarted hydrdynamic files...particle tracking" shanas pr 2 2569
Delwaq input file joe rahi 0 972
Oil dispersion DELWAQ Maria Gracioto 2 3679
confusing paragraph on Page 59 of the D-Water Quality User Manual Zhanxian Wang 2 2523
Need help for applying D-Water Quality on 0D Fatemeh GholamiMahyari 2 3427
Aggregating new substances' processes with Delft3D-WAQ Ana Costa 2 3019
I have a problem with temperature modeling in a pond Fatemeh GholamiMahyari 17 5909
I have a problem with temperature modeling in a pond Fatemeh GholamiMahyari 17 5909
Run long-term AD using a repetitive HD pattern Fernando Alvarez 1 1517
Edit algae parameterization in BLOOM Stefan Mirbach 2 2283
D-Flow FM. Temperature output file Leandro Vaz 0 3290
Coupling D-Flow with Waq Leandro Vaz 0 2838
bloominp.blm growing to 400 GB in Size!!! Daniel Harrison 1 1420
Photodegradation element in model Farihah Zakaria 4 3734
Hot Start problem in DELWAQ Yahia Kala 0 2030
Micropollutant modelling ZULHAFIZAL OTHMAN 2 2761
space varying time dependent input data Gisli Steinn Petursson 4 7233
OpenPLCT processes - why are my fluxes depth dependent? David Plew 6 4980