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

How could I set a dam break model using Delft3D?

CM
Constanzo Marullo, modified 6 Years ago.

How could I set a dam break model using Delft3D?

Youngling Posts: 10 Join Date: 1/21/13 Recent Posts
Dear all,

I'm a student of Civil Engineering and my degree thesis consists in setting up a model for an overtopping dam break scenario (determine peak outflow and transiting hydrograph downstream). I was suggested to use Delft3D-FLOW and according to several papers I've read, it is possible to do this simulation. However, I'm new to this program and still getting acquainted to it, plus I'm not completely sure how I could start setting up my model and therefore where to direct my next steps. I've already compiled the program successfully and read a couple of manuals.

I was thinking of letting the dam level decrease in time (land boundary?), as breach phenomena occurs (top width and height according to the so-called empirical equations). Is there any way to accomplish this task using QUICKIN?

Do you know another accurate way to simulate this phenomena? perhaps a section increase in time of a broad-crested weir?
Any other suggestions?
Thank you in advance.
Adri Mourits, modified 6 Years ago.

RE: How could I set a dam break model using Delft3D? (Answer)

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Constanzo,

The easiest way is to model the breach statically and run simulations starting with the (just occured) breach.

The alternative is using RTC, but this has restricted options and is not documented yet. If you want this, let me know, then I will post an example testcase here.

Regards,

Adri
CM
Constanzo Marullo, modified 6 Years ago.

RE: How could I set a dam break model using Delft3D?

Youngling Posts: 10 Join Date: 1/21/13 Recent Posts
Hello Adri,
I'd really appreciate if you could post that testcase here. I'm thinking of setting up my model statically as you mentioned, but I'd like to check another option in case something fails.
Thank you in advance
Adri Mourits, modified 6 Years ago.

RE: How could I set a dam break model using Delft3D? (Answer)

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Constanzo,

See attached zip-file.

You can not use the Delft3D-GUI to start this testcase; you'll need the example script files for Windows (.bat) and Linux (.sh) inside the zip-file. You might need to change them to have them pointing to the correct directories containing the binaries. Do read the comments in there.

Regards,

Adri