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

Running a new .mdf

MA
Mary Akurut, modified 7 Years ago.

Running a new .mdf

Youngling Posts: 18 Join Date: 3/14/13 Recent Posts
Dear,

Does anyone get such a problem when runing a new .mdf.

Starting Delft3D-FLOW computation ...
--------------------------------------------------------------------------------
Deltares, FLOW2D3D Version 6.00.00.2455, May 3 2013, 08:16:15
flow2d3d.dll entry Flow2D3D::Run
--------------------------------------------------------------------------------

Part I - Initialisation Time Dep. Data module...
runid : tut_fti
ABORT: error returned by tdatmain
Flow exited abnormally


child process exited abnormally

I tried running the examples and all was fine but after creating my .mdf file, the run does not go beyond Part I. What could be wrong?

Regards,
Mary
Emiel Moerman, modified 7 Years ago.

RE: Running a new .mdf

Padawan Posts: 84 Join Date: 3/10/11 Recent Posts
Hi Mary,

Have a look at the tri-diag file, this will give you more information of what could be wrong.

Kind regards,

Emiel
MA
Mary Akurut, modified 7 Years ago.

RE: Running a new .mdf

Youngling Posts: 18 Join Date: 3/14/13 Recent Posts
I checked my td-diag.tut_fti and got this message.

********************************************************************************
***
*** Deltares, FLOW2D3D Version 6.00.00.2455, May 3 2013, 08:16:15
***
*** runid : tut_fti
*** date,time : 2013-05-14, 17:27:41
***
********************************************************************************

*** MESSAGE Using UNESCO density formulation by default
*** MESSAGE Number of pivot points to convert wind speed to wind drag coef.: 3
*** ERROR Discontinuity in wind stress as function of wind speed:'Wstres' coeff. '4' (100.00 m/s), is equal to coeff. '6' (100.00 m/s), while coeff. '3' ( 0.00250), is not equal to coeff. '5' ( 0.00723)

*** End of tdatom for model: tut_fti ***
*** 2013-05-14 17:27:41 ***


I tried to change coeff. '5' ( 0.00723) to coeff. '5' ( 0.00250) and saved but no change. How can I proceed?
Renan Ribeiro, modified 7 Years ago.

RE: Running a new .mdf

Padawan Posts: 55 Join Date: 3/23/11 Recent Posts
Probably the wind speed breakpoint must to be in an ascending order. For example:

Wstres =  6.3000000e-004  0.0000000e+000  7.2300000e-003  5.0000000e+001  7.2300000e-003  1.0000000e+002
MA
Mary Akurut, modified 7 Years ago.

RE: Running a new .mdf

Youngling Posts: 18 Join Date: 3/14/13 Recent Posts
Thanks for your response. I was able to go past the Part I stage after changing the wind speed breakpoint to ascending order; but the simulation does not start. I am using a 64bit machine. See below:

Starting Delft3D-FLOW computation ...
--------------------------------------------------------------------------------
Deltares, FLOW2D3D Version 6.00.00.2455, May 3 2013, 08:16:15
flow2d3d.dll entry Flow2D3D::Run
--------------------------------------------------------------------------------

Part I - Initialisation Time Dep. Data module...
runid : tut_fti
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...
Part VIII - Start Simulation...

Time to finish 0s, 0.0% completed, time steps left 300


How can I proceed?
Renan Ribeiro, modified 7 Years ago.

RE: Running a new .mdf (Answer)

Padawan Posts: 55 Join Date: 3/23/11 Recent Posts
Probably you need to turn off online visualization.
Take a look at this post

Regards,
Renan
MA
Mary Akurut, modified 7 Years ago.

RE: Running a new .mdf

Youngling Posts: 18 Join Date: 3/14/13 Recent Posts
Thank you...Worked fine!!