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

FLOW-WAVE simulation error

Giulian Monteiro, modified 4 Months ago.

FLOW-WAVE simulation error

Youngling Posts: 1 Join Date: 10/13/17 Recent Posts
Hello everyone.I've been trying to run a FLOW-WAVE simulation on a 538x244 rectangular grid. However, i receive the following message whenever i start the simulation:Command: run Delft3D-FLOW
Simultaneous FLOW and WAVE computation
   Starting simultaneous FLOW and WAVE computation ...
-  Delft3D
-  Deltares, Delft3D-WAVE Version, Sep 23 2016, 15:06:05
-  Open source
*** MESSAGE: Delft3D-WAVE runs online with Delft3D-FLOW
 Domain            1  is using depth averaged flow velocity.
 Done reading input
  Waiting for initialisation from FLOW
   Starting Delft3D-FLOW computation ...
       Deltares, FLOW2D3D Version, Sep 23 2016, 15:27:09 entry Flow2D3D::Run
--------------------------------------------------------------------------------Part I    - Initialisation Time Dep. Data module...    
            runid : wtest
Part II   - Creating intermediate files...             
Part III  - Initialisation of the Execution module...  
Part IV   - Reading complete MD-file...                     
Part V    - Initialisation & checking input...              
Part VI   - Initialisation & checking second part...        
Part VII  - Initialisation output...                        
*** MESSAGE: Connected to the following 1 FLOW domain(s):
  Initialising grids and grid mappings
Part VIII - Start Simulation...                             
  Time to finish   0s,    0.0% completed, time steps left  17880
Waiting for communication with Delft3D-FLOW ...
*  Start of Delft3D-WAVE ...
  Start loop over SWAN grids, time =           0.000
  Allocate input fields
  Allocate and read SWAN depth
  Get flow fields, domain 1 :
    Time           0.000 found on com-file, group CURTIM
  Write SWAN depth file
  Write SWAN velocity file
  Deallocate input fields
  Write SWAN input
<<Run SWAN...
*** WARNING: unable to run SWAN using "". Trying with "swan.bat" ...
>>...End of SWAN run
*** ERROR: file 'norm_end' expected to signal a correct SWAN calculation

In annex, i posted some of the files generated after the error.Regards,