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

Errors running different versions of FLOW

PG
Paolo Gyssels, modified 7 Years ago.

Errors running different versions of FLOW

Youngling Posts: 21 Join Date: 4/20/11 Recent Posts
Dear guys

good to talk to you again emoticon

recently for different cases (all related to river flows) I run the same cases with a version of early 2012 and with one of the most recent in 2013 (as we start trying WAQ module).
I downloaded the new interface and compiled the new source code.

The new version stops during the running and the older version keeps running till the end with good results.

I was updating the software with the students but now I'm waiting before doing that.

Have you observed something like that in other cases?
Please, have you any suggestion?

Thank you for any help,
best regards


Paolo Gyssels
Adri Mourits, modified 7 Years ago.

RE: Errors running different versions of FLOW

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

That's new to me.

We are very interested in a testcase showing this problem. Can you zip the input files and post it on this forum? I can also give you access to our FTP-site.

Thank you.

Regards,

Adri
PG
Paolo Gyssels, modified 7 Years ago.

RE: Errors running different versions of FLOW

Youngling Posts: 21 Join Date: 4/20/11 Recent Posts
Thank you Adri,

let me prepare the cases to show to you. For the next Thursday or Wednesdey you'll get them.
Good idea if I can access to ftp. May you please prepare it for us next week?
My mail is pgyssels@gmail.com.

Thank you again

cheers,

Paolo
Adri Mourits, modified 7 Years ago.

RE: Errors running different versions of FLOW

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

I can reproduce your problem using Delft3D-FLOW version 5.01.00.2163.
Your model runs “without problems” using the latest tagged version of Delft3D-FLOW (https://svn.oss.deltares.nl/repos/delft3d/tags/2869).

Both runs show a lot of warnings in the diagnosis file. Attached is the one from revision 2163.

It seems that your model is on the edge of being stable. A slightly different executable will cause slightly different results, and that is probably the difference between crashing or not.

This post gives more information on how to solve this.

Regards,

Adri