Vertical grid in the Z-model - D-Flow Flexible Mesh - Delft3D
intro story D-Flow FM
D-Flow Flexible MeshD-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:
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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Vertical grid in the Z-model
LT
Luciana Tessarolo, modified 7 Years ago.
Vertical grid in the Z-model
Youngling Posts: 15 Join Date: 5/9/13 Recent Posts 00
Dears,
I have a doubt about how to insert the layer thickness in the Z-model. I read the DEFLT3D-FLOW manual and I didn't understand the example - input parameters (p. 581).
To test this example, I selected 5 layers and some random percentages in the window Datagroup Domain, subgroup Grid parameters. Then, I added the keywords Zmodel, Zbot and Ztop in the Datagroup Additional parameters and also the keyword Thick (this with values equal to the example). When I saw my results, I noticed my thick distribution was equal to the one in the subgroup Grid parameters.
I would like to understand what the purpose to add the Keyword Thick in the Datagroup Additional parameters.
Can you please help me?
Thank you very much!
Regards,
Luciana
I have a doubt about how to insert the layer thickness in the Z-model. I read the DEFLT3D-FLOW manual and I didn't understand the example - input parameters (p. 581).
To test this example, I selected 5 layers and some random percentages in the window Datagroup Domain, subgroup Grid parameters. Then, I added the keywords Zmodel, Zbot and Ztop in the Datagroup Additional parameters and also the keyword Thick (this with values equal to the example). When I saw my results, I noticed my thick distribution was equal to the one in the subgroup Grid parameters.
I would like to understand what the purpose to add the Keyword Thick in the Datagroup Additional parameters.
Can you please help me?
Thank you very much!
Regards,
Luciana
Adri Mourits, modified 7 Years ago.
RE: Vertical grid in the Z-model
Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts 00
Hi Luciana,
Don't add the keyword "Thick" to the "Additional parameters"!
When specifying the "Layer Thickness" in the "Domain" -> "Grid parameters" in the GUI, these values will be added automatically to the mdf-file using the preserved keyword "Thick". If you add "Thick" also via "Additional parameters", you will mess up the mdf-file with twice this keyword.
The example in the manual section B 11.1 "Grid definition and construction" must be interpreted as:
The parameter values that have been specified in the GUI are:
At "Domain" -> "Grid parameters"-> "Layer Thickness":
12.0
24.0
36.0
29.0
19.0
At "Additional Parameters":
Keyword: Zmodel Value: #Y#
Keyword: Zbot Value: -4.0
Keyword: Ztop Value: 1.0
This is also explained in section B.11.2 "Defining the keywords in the FLOW-GUI".
Regards,
Adri
Don't add the keyword "Thick" to the "Additional parameters"!
When specifying the "Layer Thickness" in the "Domain" -> "Grid parameters" in the GUI, these values will be added automatically to the mdf-file using the preserved keyword "Thick". If you add "Thick" also via "Additional parameters", you will mess up the mdf-file with twice this keyword.
The example in the manual section B 11.1 "Grid definition and construction" must be interpreted as:
The parameter values that have been specified in the GUI are:
At "Domain" -> "Grid parameters"-> "Layer Thickness":
12.0
24.0
36.0
29.0
19.0
At "Additional Parameters":
Keyword: Zmodel Value: #Y#
Keyword: Zbot Value: -4.0
Keyword: Ztop Value: 1.0
This is also explained in section B.11.2 "Defining the keywords in the FLOW-GUI".
Regards,
Adri
LT
Luciana Tessarolo, modified 7 Years ago.
RE: Vertical grid in the Z-model
Youngling Posts: 15 Join Date: 5/9/13 Recent Posts 00
Hi Adri,
I thought I should insert twice the keyword Thick because, in this example, the sum of the layer thickness is greater than 100%. When I tried to run with these values in the "Grid parameters", it didn't work and this error appeared: *** ERROR Sum of layer thickness must equal 100 %.
Could you, please, tell me if it is possible to run any example with the layer thickness greater than 100%?
Thank you very much!
Regards,
Luciana
I thought I should insert twice the keyword Thick because, in this example, the sum of the layer thickness is greater than 100%. When I tried to run with these values in the "Grid parameters", it didn't work and this error appeared: *** ERROR Sum of layer thickness must equal 100 %.
Could you, please, tell me if it is possible to run any example with the layer thickness greater than 100%?
Thank you very much!
Regards,
Luciana
Adri Mourits, modified 7 Years ago.
RE: Vertical grid in the Z-model (Answer)
Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts 00
Hi Luciana,
No, that is not possible. Thickness must always sum up to 100%. The numbers used as an example in the manual are wrong. I changed that (revision 28894).
Thanks for reporting this.
Regards,
Adri
No, that is not possible. Thickness must always sum up to 100%. The numbers used as an example in the manual are wrong. I changed that (revision 28894).
Thanks for reporting this.
Regards,
Adri
LT
Luciana Tessarolo, modified 7 Years ago.
RE: Vertical grid in the Z-model
Youngling Posts: 15 Join Date: 5/9/13 Recent Posts 00
Hi Adri,
Thank you very much for all your help.
Regards,
Luciana
Thank you very much for all your help.
Regards,
Luciana