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

Multiple bed layers

U
Ali Abrishamchi, modified 9 Years ago.

Multiple bed layers

Hello,

1- If we specify more than 1 layer for the bed, the thickness of the layers (and the bed) will be read from the *.ini file, right? Then the “Initial sediment layer thickness at bed” in the Physical Parameters/ Sediment tab could be given a random number?

2- Is “tri-diag.*” the only file to check to see what input were read by the model (to double check the input to the model)?

Thanks!
Ali
Bert Jagers, modified 9 Years ago.

RE: Multiple bed layers

Jedi Knight Posts: 201 Join Date: 12/22/10 Recent Posts
Dear Ali,

1- If we specify more than 1 layer for the bed, the thickness of the layers (and the bed) will be read from the *.ini file, right? Then the “Initial sediment layer thickness at bed” in the Physical Parameters/ Sediment tab could be given a random number?


If you specify more than 1 layer for the bed AND specify a bed composition *.ini file (in the *.mor file), then the Initial sediment layer thickness at bed (in user interface/*.sed file) can be given a random number. However, you don't have to provide a bed composition *.ini file. If e.g. your initial bed composition is uniform (but you want to keep track of bed composition during the simulation) then you can just use the Initial sediment layer thickness at bed values in the user interface/*.sed file and combine it with the multiple bed layers. In this case the initial bed composition will consist of a homogeneous mixture of the sediment amounts specified in the user interface/*.sed file.

2- Is “tri-diag.*” the only file to check to see what input were read by the model (to double check the input to the model)?


The "tri-diag" file is the only file to which we write a (partial) log of the input parameters. Another good option, is to do a simulation in which you write out data at the begin of the simulation (TStart). This allows you to verify the initial condition.

Best regards,

Bert
U
Ali Abrishamchi, modified 9 Years ago.

RE: Multiple bed layers

Dear Bert,

Thanks a lot for your sponse. It's very helpful. In addition, would you please give some hints on how to do this?
to do a simulation in which you write out data at the begin of the simulation (TStart).


Best regards,
Ali
Bert Jagers, modified 9 Years ago.

RE: Multiple bed layers

Jedi Knight Posts: 201 Join Date: 12/22/10 Recent Posts
Dear Ali,

What I meant was that in the Delft3D-FLOW GUI you should set Output -> Storage -> Store Map results: Start Time equal to Time frame -> Simulation start time. This will cause Delft3D to write the initial conditions to the trim-file, which you can inspect using QuickPlot.

Bert
U
Ali Abrishamchi, modified 9 Years ago.

RE: Multiple bed layers

Good to know, thanks Bert!

Ali