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

Modelling Thermal Only Discharge

JT
James Tomlinson, modified 7 Years ago.

Modelling Thermal Only Discharge

Youngling Posts: 6 Join Date: 4/21/11 Recent Posts
Hi All,

I would like to know if it is possible to model an additional thermal source at a particular location? This is a source of heat only and not of any accompanying flow. For example a heat-exchanger or other warm surface submerged in the water column.

My thoughts so far are:
- Include my additional heat in a modified user provided surface heat input file. However I want to control where the additional heat is inputted in the column, i.e. which layer.
- Include both an intake and outfall in the same cell that cause no net change in mass, but do provide a delta in heat/temperature. I wonder if this would work or whether the numerical scheme would not like it. I think the intake and outfall would need to be linked, i.e. a power station?
- Modify the source code somewhere to add my additional input. This might be tricky... ?


Regards,
James
Qinghua Ye, modified 7 Years ago.

RE: Modelling Thermal Only Discharge (Answer)

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

I guess you can try by this way,

1. Specify an intake and an outfall in the same cell, at the same or different layer.
2. The volume of intake and the outfall are the same, only the temp is different.
3. I would not expect any code modification since the functions should be there already unless you encounter some problem already?

Keep us update here and good luck!

Regards,

Qinghua YE
Adri Mourits, modified 7 Years ago.

RE: Modelling Thermal Only Discharge (Answer)

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

As addition on Qinghua's answer:

Look for "power station" in the manual.

Attached are an example src- and dis- file.

Regards,

Adri
JT
James Tomlinson, modified 7 Years ago.

RE: Modelling Thermal Only Discharge

Youngling Posts: 6 Join Date: 4/21/11 Recent Posts
Thanks I'll give this a try. I guess my query was whether anything bad would happen if a Power station had intake and outfall in the same location?
Adri Mourits, modified 7 Years ago.

RE: Modelling Thermal Only Discharge (Answer)

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

I'm sorry we missed that part of your question.

The intake and the outfall are handled separately, so I don't expect problems when they are in the same location.

Regards,

Adri