2.1.5 pre- and post-processing issues

The results of bottom shear stress in his file and map file are different

2023-05-23T00:18:48Z

I built a 3d flow only model which had 20 vertical layers(kmax = 20). But the bottom shear stress in his file and map file are different.
In the his file, the bottom shear stress named Mean bottom shear stress, unit is pa. And in the map file, the bottom shear stress named Total bed shear stress, unit is N m-2.
In the his file, the bottom shear stress is very big as shown in the right, it seems wrong. I compared map file result with observation data as shown in the left, it seems the result of map file is correct. But when i run 2d model (kmax = 0), his file and map file are same and correct.
I also built a3d flow-wave coupled model, and in the coupled model the results of bottom shear stress in his and map file are same and correct.
Why the bottom shear stress in his file are wrong when run flow only model?

Delft3D FM not showing the water level changes after the run

2022-07-22T11:39:27Z

Hi,
I am running a storm surge model using the Delft3D FM flow model. I was able to run it without any errors, but the model does not reflect changes in water level. The observation points indicate that the water level peaks at the beginning and then gradually decreases over time. However, it should be other way around, the water level should be at its peak during the storm (before the cyclone made landfall. But some parameters showed correct results during the storm, such as velocity and bed shear stress. I kept the model for a considerable amount of time assuming that it would need time to spin up, but the results did not change over time. The model coordinate system is in WGS84. It seems in Delft3D FM, the model gets very heavy with WGS84. Would appreciate it if anyone can help me on this issue.

Thanks

Adam

RE: Where is the waqmerge ?

2021-12-10T08:11:29Z

Hello again,
I've managed to successfully compile waqmerge using a newer version of CMake (which was mentioned in the prerequisites).
However, when I try to invoke waqmerge in order to produce a merged hyd-file from 6 domains, it stops with an error code 1:

Deltares, WAQMERGE Version 1.02.01.140474, Dec 10 2021, 09:29:56

execution start : 2021/12/10 09:41:42
** INFO : Number of domains found for project 'FlowFM': 6
ug_get_meshgeom, #12, ierr=0
ug_get_meshgeom, #12, ierr=0
ug_get_meshgeom, #12, ierr=0
ug_get_meshgeom, #12, ierr=0
ug_get_meshgeom, #12, ierr=0
ug_get_meshgeom, #12, ierr=0
ERROR opening fileFM_DELWAQ_FlowFM/FlowFM.hyd
Stopped with error code : 1
1

Any thoughts on this are much appreciated. A log file is attached to this message.
Regards,
Dmitry

RE: Where is the waqmerge ?

2021-12-06T10:10:31Z

I've found waqmerge in a newer revision of the source-code (140207). But I'm having difficulties with compiling it under Windows 10. Readme file states that one would need a CMake installed in a system. Well, I seem to have all prerequisites, but the code still does not compile. Any suggestions are much appreciated.
Regards,
Dmitry

Where is the waqmerge ?

2021-12-03T11:16:13Z

Hi there,

D-Flow FM User Manual states that:

When using multiple partitions (as described in Chapter 6), D-Flow FM will create a special
output folder per partition named <DFM_DELWAQ_mdu_name_nnnn>. Since D-Water Qual-
ity can accept results for a single partition only, you have to merge the results into one using
a tool called waqmerge.

But where can I find the waqmerge? Is it available as an openearthtools application? Or should I contact the support team in order to ask for it?
Regards,
Dmitry

RE: Unable to Run Delft3D-FM with Sigma Layers in Parallel on Linux Cluster

2021-09-22T06:25:27Z

Dear Matthew,

Since your model is running on your personal deskop, this is not a model input problem but its eems to be related to the software installation on your cliuster.

Could you run the successful simulation on your own desktop on your cluster as well? Thus, with the same (DIMR)startscript and with the same number of partitions.
This will prove whether or not this is related to the installatiion of the software.

With kind regards,
Erik de Goede

RE: Unable to Run Delft3D-FM with Sigma Layers in Parallel on Linux Cluster

2021-09-09T17:35:45Z

I wanted to provide a brief update based on my recent testing. I was able to partition the model into a contiguous domain using a smaller number of partitions (n=2), but unfortunately that did not solve the problem either. So, the hypothesis I brought forward on the previous post is incorrect and I have no further explanations for why the model will not work now.

Unable to Run Delft3D-FM with Sigma Layers in Parallel on Linux Cluster

2021-09-09T01:13:05Z

Hi all,

I'm currently trying to run a 3D Delft3D-FM (Version 2021.03) salinity simulation of an estuary using 10 sigma layers and struggling to get the simulation working on my Linux cluster. What's strange is that I'm able to get the simulation running in 2D on the same cluster and in full 3D on my person desktop (6 core machine) without any issues, but when I try and run it via DIMR on my 64 core cluster it doesn't work. I'm running it with 48 cores, and I get the following error:

=============================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= PID 72679 RUNNING AT dc011
= EXIT CODE: 11
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
YOUR APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault (signal 11)
This typically refers to a problem with your application.
Please see the FAQ page for debugging suggestions

Unfortunately my .dia file isn't very informative either. I'm partitioning the model using the automatic partition exporter (METIS, PETSC algorithm) in the GUI. I've tried other partitioning methods to no success. I've attached the full error code and .dia files to this thread.

One thing I noticed is that my GUI does not contain the "contiguous domains" option which is present in the manual (see images below). Indeed, when I check my partition I see that there are some portions of the model which are discontinuous - is that what could be causing the issue?

My Delft3D-FM Partition Exporter Options:

Manual Delft3D-FM Partition Exporter Options:

Example of my discontinuous mesh: