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! 

 

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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: 
/web/delft3dfm/forum

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.

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** PLEASE TAG YOUR POST! **

 

 

Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 


Message Boards

ERROR Number of Timesteps on COM-file too large

ED
Edward Divita, modified 8 Years ago.

ERROR Number of Timesteps on COM-file too large

Youngling Posts: 3 Join Date: 10/18/12 Recent Posts
I am running a hydrodynamic/sediment transport model using wave data generated from an offline SWAN run with the wave field computed at 1-hour intervals. I have previously used this set-up for a number of runs for one-month simulation periods, but I am currently attempting to set up a model run that will simulate a 6 month period and I get the following error message:

*** ERROR Number of Timesteps on COM-file too large. Contact Deltares
*** ERROR Flow exited abnormally

Does anyone have any recommendations for how I might be able to get this simulation to run? The COM- file in question has 4393 time steps, and is ~50Gb in size. What is the upper limit for the size of the COM- file, and is there any way to increase this limit? Is there a more efficient way to pass wave data from an offline SWAN run into FLOW?

Thanks,
-Eddie Divita
Bert Jagers, modified 8 Years ago.

RE: ERROR Number of Timesteps on COM-file too large (Answer)

Jedi Knight Posts: 201 Join Date: 12/22/10 Recent Posts
The maximum number of time steps on the COM-file is currently limited to 1500 because it determines some array sizes.
This limit can be changed by increasing the the value of maxtim in manager\src\tricom_init.f90.

Success,

Bert
ED
Edward Divita, modified 8 Years ago.

RE: ERROR Number of Timesteps on COM-file too large

Youngling Posts: 3 Join Date: 10/18/12 Recent Posts
Thanks!