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Acoustic Post Processing Error for specific simulations #131
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Hi there, |
Hi, |
Hi Andrea, thanks for the reply. I am currently using WOPWOP v3.5 and didn't encounter a problem for the other RPM; just for the specific one (5270). Best |
Ok, I changed RPM to 6000 RPM and I get strange numbers too. Thank you, |
Interesting .. have you tested it with the "tutorial" case or with a different one? |
I tried with the PSU examples and some FLOWUnsteady tutorials. I wil try with linux version. |
Okay thank you - looking forward to your results! |
@christianhauschel in #132 seems to have found what the issue is. Unfortunately I wont have time to debug this anytime soon, so I'd recommend either contacting the group at PSU developing PSU-WOPWOP asking what breaking changes they introduced in the geometry, or request for an older version (v3.4). |
I see - thanks for your feedback. Hope to have access to version 3.4.4 soon. |
Hi @philippmandl, |
Hi @AndreaRapi, many thanks for the information. Interestingly I didn't figure out so far what kind of event happens in the plots I have shared in the beginning of this conversation when I post process the SPL levels for the 1st BPF. But good to hear that the Linux-Version should be correct. BR |
@philippmandl I will try to simulate the case with 5270 RPM to check it! Is it the tutorial case? |
@AndreaRapi thank you very much! Looking forward to your results! |
@philippmandl which is the case you did? Is it the tutorial one but at 5270 RPM? |
hi @AndreaRapi, I have used my own example & airfoil geometry, but please try it with the tutorial with 5270rpm. |
That's really odd. I have run into similar issues with the number of blade elements (some number of blade elements make PSU-WOPWOP crash without a reasonable explanation). Unfortunately, there isn't much we can do to debug and pin point what the issue is since PSU-WOPWOP is a closed-source code 😞 |
Hi @AndreaRapi, I had similar issues --> changing the value to 5269.99 made a difference in the stability of PSU-WOPWOP, but the results where not realistic ... |
Hi @philippmandl, maybe we can inform PSU-WOPWOP code developers about this issue... |
Maybe you could also check with a structured grid. According to Prof. Brentner from PSU I contacted, unstructured grids might not work as well... |
Dear All,
I am currently running some post processing studies including acoustic analysis. For specific simulations the acoustic analysis runs without any problems within FLOWUnsteady and PSU-WopWop (e.g. for 5730rpm with 5deg time step size), but for some of the simulations (5270rpm with 5deg time step size) I am always running into the following problem:
_WARNING: No number of observer containers specified.
Defaulting nbObserverContainers in the Environment in
namelist to 1
WARNING: Recording pressure or spectrum over grid.
This may be a VERY large file.
ERROR: The timestep in the surface file does not match that in the
loading file_
Do you have any idea what might be the problem?
Thanks in advance!
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