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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

Problems Running Delft3D Simulation in Parallel on Linux Cluster

MS
Michael Salisbury, modified 5 Years ago.

Problems Running Delft3D Simulation in Parallel on Linux Cluster

Youngling Posts: 4 Join Date: 8/27/13 Recent Posts
Hi All,

I'm currently having issues consistently running simulations in parallel on a Linux machine and I'm not sure how to fix it. I'm able to run a simulation some of the time, but then I'll try to re-run the simulation and I get the error below. I find this odd because I get this error message even if I use the same exact input files and command line executions. I've checked with the system admins and everything seems to be compiled correctly as far as we can tell (hence it'll work some of the time), but then it'll have problems with the tri-prt file when I re-run a simulation. Has anyone encountered this issue? If so, any suggestions on how to fix it? Please let me know.

forrtl: severe (24): end-of-file during read, unit 34, file /gpfs/fs1/work/msalisbury/DELFT3D_TEST/NEST_TEST/tri-prt.MDF_Domain_PrimeHook_fine
Image PC Routine Line Source
libintlc.so.5 00002B4EFB06EA1E Unknown Unknown Unknown
libintlc.so.5 00002B4EFB06D4B6 Unknown Unknown Unknown
libifcore.so.5 00002B4EFF9D1BDE Unknown Unknown Unknown
libifcore.so.5 00002B4EFF941A3F Unknown Unknown Unknown
libifcore.so.5 00002B4EFF940EFD Unknown Unknown Unknown
libifcore.so.5 00002B4EFF979CFC Unknown Unknown Unknown
libflow2d3d.so 00002B4EFC021829 prihis_ 103 prihis.f90
libflow2d3d.so 00002B4EFC00D624 inippr_ 330 inippr.f90
libflow2d3d.so 00002B4EFBC1B5CF tricom_init_ 1502 tricom_init.F90
libflow2d3d.so 00002B4EFBC2851A mod_trisim_mp_tri 348 trisim_mod.F90
libflow2d3d.so 00002B4EFBC28E49 trisim_ 96 trisim.F90
libflow2d3d.so 00002B4EFBBCFC1F Unknown Unknown Unknown
d_hydro.exe 00000000004030F8 Unknown Unknown Unknown
libc.so.6 000000321EC1D994 Unknown Unknown Unknown
d_hydro.exe 0000000000402CC9 Unknown Unknown Unknown
--------------------------------------------------------------------------

Thanks,
Mike
Qinghua Ye, modified 5 Years ago.

RE: Problems Running Delft3D Simulation in Parallel on Linux Cluster

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Mike,

Is it possible that the file name of tri-prt is too long? Can you also try a shorter mdf name?

Regards,

Qinghua
MS
Michael Salisbury, modified 5 Years ago.

RE: Problems Running Delft3D Simulation in Parallel on Linux Cluster

Youngling Posts: 4 Join Date: 8/27/13 Recent Posts
Hi Qinghua,

Thanks for the response. Unfortunately, I tried shortening the mdf name, but I still encountered this problem. This is an odd problem (to me anyways) because I'll run a set of input files and the simulation will work, but then I'll try the exact same simulation in the same directory and I'll get this error message. I've been going through a long trial-and-error process, but I haven't pinpointed the exact problem yet. Do you have any other suggestions? Please let me know.

Thanks for your time,
Mike
Qinghua Ye, modified 5 Years ago.

RE: Problems Running Delft3D Simulation in Parallel on Linux Cluster

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Mike,

I don't quite understand the problem. Is that possible that when you start the simulation again, and the file system still didn't release the access of the file? Did you try to using Stage in/out to do the computation on linux platform?

Just wild guess without enough information.

Regards,

Qinghua
AR
Anas Rahman, modified 5 Years ago.

RE: Problems Running Delft3D Simulation in Parallel on Linux Cluster

Youngling Posts: 21 Join Date: 10/4/13 Recent Posts
Hi Qinghua ,

I would like to confirm something with you.

Can I run domain decomposition - FLOW simulation in parallel in Linux?

in the download page, it is stated that "DomainDecomposition on multiple nodes" does not working properly.

Does the multiple nodes here refers to parallel computing?


Best regards
Anas
Qinghua Ye, modified 5 Years ago.

RE: Problems Running Delft3D Simulation in Parallel on Linux Cluster

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Anas,

Can I run domain decomposition - FLOW simulation in parallel in Linux?

No.

Delft3D works either with Domain decomposition or Parallel computing, but not with both at the same time. Multi-node here means acrossing computers.

Regards,

Qinghua
AR
Anas Rahman, modified 5 Years ago.

RE: Problems Running Delft3D Simulation in Parallel on Linux Cluster

Youngling Posts: 21 Join Date: 10/4/13 Recent Posts
Thank you so much for your prompt reply Qinghua.

Regards
Anas