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

Issue with time zone and astronomic boundary conditions in Delft Dashboard

DL
Daniel Livsey, modified 2 Years ago.

Issue with time zone and astronomic boundary conditions in Delft Dashboard

Youngling Posts: 2 Join Date: 2/23/16 Recent Posts
All,

I am running Delft Dashboard from Matlab and I am trying to generate astronomic boundary conditions from the "Model Maker" toolbox of Delft Dashboard. When I stipulate the "Time Zone (h)" in the "Time Frame" tab, a value used to adjust the astronomic boundary constituents, the boundary condition routine fails and I receive the following error in the Matlab command window, "Assignment has more non-singleton rhs dimensions than non-singleton subscripts". The boundary condition routine runs if I leave "Time Zone (h)" empty.

Has anyone else had this issue and found a solution?

Daniel
AD
A D, modified 1 Year ago.

RE: Issue with time zone and astronomic boundary conditions in Delft Dashbo

Youngling Posts: 15 Join Date: 9/25/17 Recent Posts
Did you manage to resolve the issue?
If not, check the timezone.
DL
Daniel Livsey, modified 1 Year ago.

RE: Issue with time zone and astronomic boundary conditions in Delft Dashbo

Youngling Posts: 2 Join Date: 2/23/16 Recent Posts
Hi A D,

No, I have not resolved the issue. When you say, "check the timezone" I am only aware of the "Time Zone (h)" field in the "Time Frame" tab of Delft Dashboard. Is there another location or field in Delft Dashboard where I may stipulate a timezone? I am trying to use - 8 GMT/UTC (i.e. PST).

Thanks,
Daniel
AD
A D, modified 1 Year ago.

RE: Issue with time zone and astronomic boundary conditions in Delft Dashbo

Youngling Posts: 15 Join Date: 9/25/17 Recent Posts
Nope. As far as I know, that is the only place where you can set it.
I'm not sure what could be wrong with your model.
These are the points mentioned in the FLOW manual under the Local Time Zone section. Just check if you have entered anything wrong.

The time difference between local time and UTC.
The time zone is defined as the time difference (in hours) between
the local time (normally used as the time frame for Delft3D-FLOW)
and Coordinated universal time (UTC). The local Time Zone is used
for for two processes:
To determine the phases in local time of the tidal components
when tide generating forces are included in the simulation, see
Data Group Processes.
To compare the local time of the simulation with the times at
which meteo input is specified, e.g. wind velocities and atmospheric
pressure. These can be specified in a different time zone.

Restrictions:
If open boundaries are used with forcing type Astronomic then dates may not be before
1 January 1900.
The start and stop date must be equal to or larger than the reference date.
The start and stop time must be integer multiples of the time-step.
The simulation stop time must be equal to or larger than the simulation start time.
The time step must be positive.