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! 

 

=======================================================
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.

=======================================================

** PLEASE TAG YOUR POST! **

 

 

Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 


Message Boards

Can the lower limit of SEDTHR be changed? (min. depth for sed. calculation)

GD
Gonzalo Duro, modified 6 Years ago.

Can the lower limit of SEDTHR be changed? (min. depth for sed. calculation)

Youngling Posts: 11 Join Date: 12/4/13 Recent Posts
Hello everybody,

I am a rather new user of Delft3D and I am doing some 2D runs for validation purposes. The case I am computing has low water depth values (in the order of 5cm) which are present in the physical model I am intending to reproduce. Given the fact that the parameter SEDTHR, which stands for the 'minimum depth for sediment calculation', ranges from 0.1m to 10m, the simulations have no morphological changes because the water levels are below the lower limit of SEDTHR.

How can this constraint be changed?

I would really appreciate if someone can answer this question, since I need these results a.s.a.p. for my thesis.

Best regards,

Gonzalo
Adri Mourits, modified 6 Years ago.

RE: Can the lower limit of SEDTHR be changed? (min. depth for sed. calculat (Answer)

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

In the morphology input file.
mdf-file:
Filmor= #my.mor#


my.mor file:
[Morphology]
   SedThr  = 0.020


You als have to change the drying criterium in the mdf-file:
Dryflc= 0.010


Regards,

Adri
GD
Gonzalo Duro, modified 6 Years ago.

RE: Can the lower limit of SEDTHR be changed? (min. depth for sed. calculat

Youngling Posts: 11 Join Date: 12/4/13 Recent Posts
Thank you so much Adri !