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

Diffrent Visualization of the same grid file in Flow and Wave modules

FL
Fuchun Lai, modified 4 Years ago.

Diffrent Visualization of the same grid file in Flow and Wave modules

Youngling Posts: 1 Join Date: 12/25/15 Recent Posts
Dear friends:
I run a simulation of Storm Surge by coupling Flow and Wave modules. While something go wrong and it shows "SWAN PRINT file contains ERROR". So I check the PRINT file, and it says "Error : 3 comp. grid points on one line" and "Error: Grid angle <0 or >180 degrees".
I think the point is in the grid file, in more detail the grid file shows normally in Flow Visualization and RGFGRID, while it shows mussy and wild in Wave Visualization. I don't know how to correct it.
My grid file is attached.
Qinghua Ye, modified 4 Years ago.

RE: Diffrent Visualization of the same grid file in Flow and Wave modules (Answer)

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

As we know now, the missing value in wave grid cannot be -999.000, but should be 0.000,

Regards,

Qinghua
Yahia Kala, modified 3 Years ago.

RE: Diffrent Visualization of the same grid file in Flow and Wave modules

Youngling Posts: 12 Join Date: 7/11/13 Recent Posts
This solved the issue for me. Strange, I never had this problem before.
AY
A Yawer, modified 2 Years ago.

RE: Diffrent Visualization of the same grid file in Flow and Wave modules

Youngling Posts: 3 Join Date: 1/5/16 Recent Posts
Hello,

I am having a similar problem to the OP. I have a grid and depth that display well in both QUICKIN and in the Delft3D-FLOW input, but when I try to visualize it in DELFT3D-WAVE all I get is a straight line. I tried filling the missing depth values with 0.000 and I still got just a line when I tried to visulize area in DELFT3D-WAVE.

I have attached my grid files.
Philip Jayson-Quashigah, modified 2 Years ago.

RE: Diffrent Visualization of the same grid file in Flow and Wave modules

Youngling Posts: 11 Join Date: 8/13/15 Recent Posts
A Yawer:
Hello,

I am having a similar problem to the OP. I have a grid and depth that display well in both QUICKIN and in the Delft3D-FLOW input, but when I try to visualize it in DELFT3D-WAVE all I get is a straight line. I tried filling the missing depth values with 0.000 and I still got just a line when I tried to visulize area in DELFT3D-WAVE.

I have attached my grid files.


I am currently facing a similar issues as well I get the error '3 comp. grid points on one line' even though I have replaced the missing values with 0.000

Were you able to work around it or any help from the platform.

Looking forward

Philip
YJ
Yoan Jericko, modified 6 Months ago.

RE: Diffrent Visualization of the same grid file in Flow and Wave modules

Youngling Posts: 16 Join Date: 9/26/19 Recent Posts
Fuchun Lai:

Dear friends:
I run a simulation of Storm Surge by coupling Flow and Wave modules. While something go wrong and it shows "SWAN PRINT file contains ERROR". So I check the PRINT file, and it says "Error : 3 comp. grid points on one line" and "Error: Grid angle <0 or >180 degrees".
I think the point is in the grid file, in more detail the grid file shows normally in Flow Visualization and RGFGRID, while it shows mussy and wild in Wave Visualization. I don't know how to correct it.
My grid file is attached audacity temp mail origin.
As we know now, the missing value in wave grid cannot be -999.000, but should be 0.000,
ZM
Zhina Mohammed, modified 3 Months ago.

RE: Diffrent Visualization of the same grid file in Flow and Wave modules

Youngling Posts: 1 Join Date: 5/2/15 Recent Posts
Dear AllI have created a grid, I did not have any problem in Quick in, but when I created the (.mdf) file,  I visualize the grid to specify the boundary, the grid is not the same as I created in quick in.  But my scale is a little small, does that problem related to the scale?
 I attached the grid in the visualization area and  quick in



your help is appreciatedZhina