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

Space varying meteorological input

AS
Aleksandr Semchukov, modified 2 Years ago.

Space varying meteorological input

Youngling Posts: 13 Join Date: 5/28/15 Recent Posts
Hello.

Please, tell me, what are the values for "quantity" and "unit" keywords in the input files for space varying air, temperature, cloudiness and humidity? I have found nothing about it in the Flow manual.

Is it possible to specify space varying precipitation (and evaporation)?
Adri Mourits, modified 2 Years ago.

RE: Space varying meteorological input (Answer)

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Aleksandr,

You are right: this information is indeed missing in the manual. Thanks for reporting this. I'll make sure it will be added. Here is the missing information:


Precipitation on a separate curvilinear grid:
Fwndgpr

Precipitation on a separate equidistant grid:
Filwpr


quantity1 = air_temperature
unit1 = Celsius

quantity1 = cloudiness
unit1 = %

quantity1 = relative_humidity
unit1 = %

quantity1 = precipitation
unit1 = mm/h

Regards,

Adri
AS
Aleksandr Semchukov, modified 2 Years ago.

RE: Space varying meteorological input

Youngling Posts: 13 Join Date: 5/28/15 Recent Posts
Thank you very much, dear Adri.

What is the file name extension for space varying precipitation?

In the *.eva file precipitation, evaporation, and precipitation temperature are given together.

Is only precipitation given in the file of for space varying precipitation?

Are there the similar files for space varying evaporation or precipitation temperature?

Do I need to specify Maseva to use space varying precipitation in mass balance? Will be evaporation used in mass balance then?
Adri Mourits, modified 2 Years ago.

RE: Space varying meteorological input (Answer)

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Aleksandr,

What is the file name extension for space varying precipitation?
> ampr, is adviced. other file name extensions are not forbidden.

Is only precipitation given in the file of for space varying precipitation?
> Yes

Are there the similar files for space varying evaporation or precipitation temperature?
> No. Looking at the source code: I expect it will work if you have both a *.eva file (with dummy precipitation, valid evaporation, valid precipitation temperature, all constant in space, varying in time) and a *.ampr file (with valid precipitation, varying in space and time). The dummy precipitation values in the *.eva file will be overwritten by the values in the *.ampr file.

Do I need to specify Maseva to use space varying precipitation in mass balance?
> yes

Will be evaporation used in mass balance then?
> yes

Regards,

Adri
AS
Aleksandr Semchukov, modified 2 Years ago.

RE: Space varying meteorological input

Youngling Posts: 13 Join Date: 5/28/15 Recent Posts
Thanks!