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

Strange display of grid in FLOW visualization area

BF
Benjamin Freudenberg, modified 1 Year ago.

Strange display of grid in FLOW visualization area

Youngling Posts: 2 Join Date: 10/2/18 Recent Posts

Hello everyone,

using the FLOW-module of Delft3D a very strange error/bug occured to me, which i can not solve.

I created a Grid in RFGRID following the guidelines given in chapter 5.27 Create grid from splines of the RFGRID User Manual.

As you can see in Figure 1 (see attachments) the grid looks perfectly fine. Loading the grid in the flow module however, results in a strange display of the visualization area (given in Figure 2).

Because of that, it is not possible for me to set boundaries using the tools of the visualization area.

Oddly enough I created a grid a while ago, using the same tools but no abnormalities were shown. If I load the *.mdf file or even the *.grd file of this past project, the visualization area looks just as it should. So I checked both grid-files in notepad, but no major differences were noticed by me.

So what did I do since the last time I created this working grid? Well... nothing really. No new software was installed, nor any changes in code or anything similar was made.

To solve this issue i already tried several different options:

  • When searching the message board, I could find some posts reporting a similar error occuring in the Wave-Module. It has been recommended to edit the *.grd-file by setting the missing value from -9.99999E+02 to 0.000. Nonetheless this could not solve the issue either.
  • I tried uninstalling and reinstalling Delft3D-GUI
  • I tried recompiling the source code using the \trunk-version
  • I tried recompiling the source code using \tags\delft3dfm\63063

 

I would be glad if you could give me some idea on why this error could occur and on how to solve it.

 

With kind regards

Benjamin

Richard Measures, modified 1 Year ago.

RE: Strange display of grid in FLOW visualization area

Jedi Knight Posts: 178 Join Date: 3/23/11 Recent Posts

Not sure this will help but have you checked you have the correct enclosure file selected in the flow GUI (i.e. the enclosure file that is paired with the grid) having mismatched .enc and .grd files could lead to some weird problems?

BF
Benjamin Freudenberg, modified 1 Year ago.

RE: Strange display of grid in FLOW visualization area

Youngling Posts: 2 Join Date: 10/2/18 Recent Posts

Hello Richard,

thanks for your reply! Sadly this didn't solve the issue. I double checked that the correct enclosure file is loaded but the problem persists. In fact it didn't make a difference if I load the enclosure file or not.