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

Delft3D-FLOW parallel computation on windows platform

U
Serene Tay, modified 8 Years ago.

Delft3D-FLOW parallel computation on windows platform

Hi,

Recently, I have attempted parallel Delft3D-FLOW computation on my 8 core Windows PC. However, I have observed that the computed results of using 1 core and multi-cores (2,4 and 6) are different (up to 0.1 m in water level), the results of using 2, 4 and 6 cores are also different but at a much smaller scale.
I understand that the parallel computation on windows platform has not been fully tested, but is there any chance that it will be looked into and updated soon?

Serene Tay
Qinghua Ye, modified 8 Years ago.

RE: Delft3D-FLOW parallel computation on windows platform

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi, Serene,

Yes, indeed. It happens when your model is very sensitive to the partitioning during the parallelization. My suggestion would be to modify a bit your model, e.g., half the time step, make your grid a bit finer even. That might be help to remove the sensitivity due to the parallelization.

Regards,

Qinghua
Qinghua Ye, modified 8 Years ago.

RE: Delft3D-FLOW parallel computation on windows platform

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi, Serene,

Refer to the file in the open source folder: .\src\engines_gpl\flow2d3d\doc\parallel_status.txt, where states those features supported in parallelization and those not.

Hope this help a bit!

Qinghua