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

faster way for triangular interpolation

HW
Hao Wang, modified 5 Years ago.

faster way for triangular interpolation

Youngling Posts: 9 Join Date: 9/8/14 Recent Posts
Dear All!

I am working with Delft3d and create grid from RGFGrid. The speed of triangular interpolation is bloody slow and my sample database doesn't cover all the domain.

Anybody has a faster solution for that? Using MATLAB wldep and wlgrid can write .dep file, but still stuck in interpolation process. Normal interp2 or griddata didn't work.

best regards!
JM
Jan Mooiman, modified 4 Years ago.

RE: faster way for triangular interpolation

Youngling Posts: 14 Join Date: 1/7/11 Recent Posts
Dear Hao,

Is it RGFGRID or QUICKIN? Both programs have a triangulation routine.

Regards Jan Mooiman
HW
Hao Wang, modified 4 Years ago.

RE: faster way for triangular interpolation

Youngling Posts: 9 Join Date: 9/8/14 Recent Posts
Hey Jan many thanks!

It is quickin. I want to have a bathymetry file (.dep) based on interpolation with xyz samples.
Do you mean both of them have Matlab routine?
Qinghua Ye, modified 4 Years ago.

RE: faster way for triangular interpolation

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Dear Hao,

Is it because of a too big xyz dataset file? Can you pose pic showing the grid overlaying with xyz points?

Regards,

Qinghua
HW
Hao Wang, modified 4 Years ago.

RE: faster way for triangular interpolation

Youngling Posts: 9 Join Date: 9/8/14 Recent Posts
Dear Qinghua,

yes my xyz sample file is very big because of high resolution.

What I did is to plot polygon and triangular interpolation one by one part. It is not a smart way and also very slow.

My data sample can almost cover all the important region of my domain and just leave deep water part as empty.


regards,
Hao
CL
Cathy liu, modified 3 Years ago.

RE: faster way for triangular interpolation (ask this question again)

Youngling Posts: 1 Join Date: 6/8/16 Recent Posts
Hi Hao,

I met the same situation as you: I want to get a *.dep file by triangular interpolating using QUICKIN, but it's super slow and showed me 'no response' afterwards. It's very frustrated. I know it must be because of the *.xyz file is too big. But I need to have a fine one because I will use it to DD estuaries. Had you solved the problems and could you please share the method with me?

Could anybody give me some suggestions on:

1. Are there any MatLab tools can make the interpolation (to *.dep in D3D QUICKIN) faster?
Or
2. Are there any methods to make a *.xyz file which can be used to interpolated to *.dep file and DD to different resolutions from very coarse grids with large extent (about 2130 m) to very fine grids (about 10 m) but without very big capacity? (May I make a .xyz file with very coarse resolution over the whole big region and input more xyz points at the region where I want to DD high resolution grids?)

Thanks a lot for your help.

Cathy