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

Model Calibration with OpenDA

SM
Stefan Mirbach, modified 8 Years ago.

Model Calibration with OpenDA

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
Hello,

I've started using OpenDA with Delft3D-Flow. What I want to do is to calibrate a few parameters (wind drag coefficients, diffusion coefficients, heat model coefficients) to optimize time series of water temperature. I followed the OpenDA-Webinar and studied the estuary example, but I've still two questions. Please let me know if there are other sources of information, like a documentation of the d3d-plugin or further examples. On to the questions:

1. How should the ioObject-tag in the Wrapper-file look like if I want to calibrate, for example, the 'Dicouv'-Parameter in the mdf-file of Delft3D? Can you give me an example? Also, could you give me an example how the parameters-tag in the StochModel file should look like if I want to vary this parameter between 0 and 10?

2. In the estuary example water levels are read from the trih-file as results. How can I read water temperatures from a trih-file of a specific layer?

Best regards,

Stefan Mirbach
JF
Jose Manuel Fernandez Jaramillo, modified 8 Years ago.

RE: Model Calibration with OpenDA

Youngling Posts: 5 Join Date: 4/26/11 Recent Posts
Hi Stefan,

Did you find something? I am also interested to use OpenDA with additional parameters.

Best regards, Jose Manuel
Qinghua Ye, modified 7 Years ago.

RE: Model Calibration with OpenDA

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi Stefan and Jose,

You might be abale to find some documents and examples on the openDA website http://www.openda.org.

You can also contact with our experts Martin Verlaan for examples and so on.

For Jose's 2nd question: In the estuary example water levels are read from the trih-file as results. How can I read water temperatures from a trih-file of a specific layer?

Yes, you can read the temperature at each layer by matlab code, refer to src\tools_lgpl\matlab\quickplot\progsrc, or directly by read the binaries using fortran or other languages, refer to the source code.

Regards,

Qinghua
SM
Stefan Mirbach, modified 7 Years ago.

RE: Model Calibration with OpenDA

Youngling Posts: 15 Join Date: 1/3/12 Recent Posts
Hi Jose,

I'm afraid I can't help you on this, I didn't pursue it any further.

Best regards
Stefan