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

Morphology with Z-Layers

SM
Stefan Mirbach, modified 8 Years ago.

Morphology with Z-Layers

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
Hi everyone,

I'm using Delft3D-Flow with the z-model for modelling a lake with steep sloping bottom topography which is stratified for most of the year. I'm interested in modelling sediments in the lake, but unfortunately I'm getting an error message saying z-model with morphology is not available.

Since part of this forum is devoted to using the z-model with morphology ("scour around structures") I'm wondering if I'm doing something wrong. Is it possible to use the combination of the z-model with morphology with the open-source version of Delft3D-Flow? If not, is this something which is planned to be implemented in the near future?

Thanks!

Stefan
Bert Jagers, modified 8 Years ago.

RE: Morphology with Z-Layers (Answer)

Jedi Knight Posts: 201 Join Date: 12/22/10 Recent Posts
Hi Stefan,

Correct, the trunk version does not support the combination of morphology with the z-layer model.

We have created a branch in which z-layer model and morphology can be combined, but it's more difficult to get nice smooth near bed velocities, bed shear stresses (and hence bed level changes) due to the z-layer grid. Since there were enough other problems with the z-layer model, progress in that branch has been slow. Since the research branch that I'm referring to was started before Delft3D went open source, it's still in our old repository.

However, your question comes at a perfect time. We happen to have a meeting tomorrow on this topic, so I'll put forward your interest. I expect that we'll merge the code changes of the old z-layer/morphology branch with one of the z-layer research branches in the oss repository. We'll post relevant information here when plans have become more concrete.

Best regards,

Bert
SM
Stefan Mirbach, modified 8 Years ago.

RE: Morphology with Z-Layers

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
Great, thanks a lot!

Best regards,

Stefan
Dmitry Kushnir, modified 7 Years ago.

RE: Morphology with Z-Layers

Jedi Knight Posts: 107 Join Date: 11/9/12 Recent Posts
Hi,

Can the sediment be modelled with Z-layer? The manual states that currently morphology cannot be used in combination with Z-model. Might there be any chances to do that?

Regards,

Dmitry
SM
Stefan Mirbach, modified 7 Years ago.

RE: Morphology with Z-Layers

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
Hi Dmitry,

yes I think it is possible. I tried it a few months back and it was working.

Regards,
Stefan
Dmitry Kushnir, modified 7 Years ago.

RE: Morphology with Z-Layers

Jedi Knight Posts: 107 Join Date: 11/9/12 Recent Posts
Hi Stefan,

Thank you very much. I will sure give it a try.

Regards,
Dmitry
Adri Mourits, modified 7 Years ago.

RE: Morphology with Z-Layers

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

"Sediment transport in Z-layers" is beta-functionality, "morphology in Z-layers" is research functionality.

Regards,

Adri