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intro story DELWAQ

DELWAQ

DELWAQ is the engine of the D-Water Quality and D-Ecology programmes of the Delft3D suite. It is based on a rich library from which relevant substances and processes can be selected to quickly put water and sediment quality models together.

The processes library covers many aspects of water quality and ecology, from basic tracers, dissolved oxygen, nutrients, organic matter, inorganic suspended matter, heavy metals, bacteria and organic micro-pollutants, to complex algae and macrophyte dynamics. High performance solvers enable the simulation of long periods, often required to capture the full cycles of the processes being modelled.

The finite volume approach underlying DELWAQ allows it to be coupled to both the structured grid hydrodynamics of the current Delft3D-FLOW engine and the upcoming D-Flow Flexible Mesh engine (1D-2D-3D) of the Delft3D Flexible Mesh Suite (or even other models such as TELEMAC).

'DELWAQ in open source' is our invitation to all leading experts to collaborate in further development and research in the field of water quality, ecology and morphology using Delft3D. Feel free to post your DELWAQ related questions or comments in this dedicated forum space. If you are new to DELWAQ, the tutorial (in the user manual) is a good place to start. A list of DELWAQ related publications is available here.

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Sub groups
D-Flow Flexible Mesh
DELWAQ

Cohesive sediments & muddy systems

 


Message Boards

Dpart - (particle tracking) using telemac data?

JF
John Floyd, modified 3 Years ago.

Dpart - (particle tracking) using telemac data?

Youngling Posts: 6 Join Date: 8/4/11 Recent Posts
Hello,

I have tried to read in the hyd file and associated files created from telemac. This works with dwater quality as expected.

It does not work with dpart - I get a read error on opening the hyd file.

Is l dpart supposed to work with this input?

regards
MJ
Michel Jeuken, modified 3 Years ago.

RE: Dpart - (particle tracking) using telemac data?

Jedi Knight Posts: 156 Join Date: 1/21/13 Recent Posts
Hi,

D Particle Tracking only works on sigma layered curvilinear grids as provided by Delft3D FLOW or SIMONA. TELEMAC grids do not comply to this. We are investigating how to get PART running on our Delft3D Flexible Mesh output, but there is no planned release for that at the moment.

regards,
Michel
JF
John Floyd, modified 3 Years ago.

RE: Dpart - (particle tracking) using telemac data?

Youngling Posts: 6 Join Date: 8/4/11 Recent Posts
Ah disappointing, so really it is a separate component not really part of dwater system.

I had assumed that it used the same generic gridding system - which is what makes delwaq a very interesting system and multi use system. But thinking about it - delwaq really does not know how things relate in an xy fashion, just what goes in and out and where it goes to (in terms of cell ids). Xyz vectors dont enter into it - that is taken care of by reducing it to fluxes between cells.

Thanks for the quick response.
MJ
Michel Jeuken, modified 3 Years ago.

RE: Dpart - (particle tracking) using telemac data?

Jedi Knight Posts: 156 Join Date: 1/21/13 Recent Posts
Yes, Delwaq does not need to know any coordinates, which makes it less depended on the way hydrodynamic grids are defined.

As for PART, well it was (and still is) connected to the old structured Delft3D FLOW since the 1990s, and as such labelled as part of the Delft3D suite. However, it did not keep up with the newer Flexible Mesh approach and grid definitions.

The methodology is described in this article (http://onlinelibrary.wiley.com/doi/10.1002/fld.3705/abstract sorry, no open access), which is in short based in relative x and y coordinates (scaled 0.0-1.0), which is only valid in curved rectangular grid cells. Even when PART would be able to read the new grid definition from FM, then still we have to develop a new solver method to deal with triangular grids.