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 model

CV
cristina viola, modified 3 Years ago.

Morphology model

Youngling Posts: 3 Join Date: 3/10/16 Recent Posts
Dear all,

I am a curious Mozambican engineer, trying to learn and progress in coastal modelling. I am a bit familiar with Delft3D (not yet with flexible mesh), but I am struggling now trying to calibrate or improve a model I have been working on.

I am using Delft 3D to model a tidal inlet with a small town in which we are trying to see how the coast changes with time due to waves and tides. For that matter I have set a coupled model (flow and wave) which I send attached both mdf and mdw files. Also attached I send a result of my model which is my main concern as there is a problem along my Neumann Boundary, a stain with high water levels while the Sea Boundary has no water at all. It seems like the communication between the two grids is not OK and somehow only the Neumann boundary receives some water. I have tried to set the model again and use a different bathymetry but so far the stain is still there. Is there anything I am missing or I should do to make it work properly? I hope you can help me

Looking forward to hear from you

Kindly

Cristina Viola
Qinghua Ye, modified 2 Years ago.

RE: Morphology model

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Cristina,

It is difficult for us to target the problem. You mentioned it is a coupled flow-wave simulation. There are problems with dry boundaries. But you showed the wave result from wave model. Are the flow results good? Or I misunderstood your question.

Greetings,

Qinghua
CV
cristina viola, modified 2 Years ago.

RE: Morphology model

Youngling Posts: 3 Join Date: 3/10/16 Recent Posts
Thank you Qinghua,

It seems that the flow results are ok. I have attached it below.
Please give some comments regarding it.
I have tried to modify the boundaries and the the bathymetry but still did not work. Can it be a problem with my Neumann boundary?

I am accepting suggestions.

Thank you for your attention.

Cristina Viola
CV
cristina viola, modified 2 Years ago.

RE: Morphology model

Youngling Posts: 3 Join Date: 3/10/16 Recent Posts
Dear Qinghua,

I have sent you the results of the flow model which I think are fine. Is there any comment you would like to make about it? Is there any procedure that I am missing?


Regards