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

Obstacle in GUI

SM
SEYED MOIN MOJABI, modified 4 Years ago.

Obstacle in GUI

Youngling Posts: 11 Join Date: 10/16/15 Recent Posts
Dear All

I have to calculate transmission coefficient of the obstacle using Van der Meer et al (2005) formula. The formula is available in SWAN, however it is not supported by GUI. How should I use SWAN with DELFT3D, when I need to use this formula which is not supported by GUI

Thank you in advance for your time and consideration
GR
Gabriel Ruiz, modified 4 Years ago.

RE: Obstacle in GUI

Padawan Posts: 59 Join Date: 9/30/11 Recent Posts
Hi Seyeb,

You can give to WAVE (SWAN) the transmission coefficient through the obstacle file (*.obs). The keyword, that you should use, is “TransmCoef”. You can do the *.obs with any txt editor. Check the WAVE manual, section A.2.4.

Kind regards.

Gabriel
SM
SEYED MOIN MOJABI, modified 4 Years ago.

RE: Obstacle in GUI

Youngling Posts: 11 Join Date: 10/16/15 Recent Posts
Thank you for your kind advice Gabriel

The main question is that, are the intended parameters are written in the swan input file (swaninp) if I change the parameters in the obstacle file (.obs)??

Cheers

Moin
Adri Mourits, modified 4 Years ago.

RE: Obstacle in GUI (Answer)

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Moin,

This is how Delft3D-WAVE works:
1. Read input files (mdw, grids, obs, etc.)
2. Produce SWAN input files
3. Execute script "swan.bat" (Linux: "swan.sh"), found via the environment parameter "PATH". The screen output should contain the full name, including the path, of swan.bat. Inside swan.bat:
3.a Copy/remove some files
3.b Execute SWAN. The screen output should contain the full name, including the path of the SWAN executable being used.
4. WAVE reads SWAN output and continues

This "swan.bat" script is an ascii platform script in which you influence the process. For example by putting the following line before the SWAN execution:
pause
the execution of the swan.bat script is on hold. You can inspect/change the SWAN input and then continue again by pressing the enter key. Alternatively you can add something like:
copy my_INPUT INPUT
to automatically overwrite the SWAN input.

Regards,

Adri