Errors related to monitors

[tejalprabhu01]

🔍 Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

🐞 Description of the bug

A customer reported following errors while using pyfluent from Fluent nodes in optiSLang:

@seanpearsonuk @ajain-work

📝 Steps to reproduce

Unfortunately I donot know which command leads to this, since it was reproduced on the customer machine. If more information is required, Please let me know.

💻 Which operating system are you using?

Windows

📀 Which ANSYS version are you using?

2023R2

🐍 Which Python version are you using?

3.10

📦 Installed packages

ansys-fluent-core

[seanpearsonuk]

Thank you for submitting this, @tejalprabhu01.

Yes, for the customer's sake, if they can provide the ful details, it will help in finding a solution.

[hpohekar]

@seanpearsonuk @tejalprabhu01

I have investigated it now.

The primary guess is that the user has either not read data file or not called iterate() before executing methods of solver_session.monitors_manager.

e.g

solver_session.monitors_manager.get_monitor_set_names()
solver_session.monitors_manager.get_monitor_set_data(monitor_set_name="residual")

Normal solver session

>>> import ansys.fluent.core as pyfluent
>>> from ansys.fluent.core import examples
>>> import_case = examples.download_file(file_name="exhaust_system.cas.h5", directory="pyfluent/exhaust_system")
Checking if specified file already exists...
File already exists. File path:
C:\Users\hpohekar\AppData\Local\Ansys\ansys_fluent_core\examples\exhaust_system.cas.h5
>>> import_data = examples.download_file(file_name="exhaust_system.dat.h5", directory="pyfluent/exhaust_system")
Checking if specified file already exists...
File already exists. File path:
C:\Users\hpohekar\AppData\Local\Ansys\ansys_fluent_core\examples\exhaust_system.dat.h5
>>> solver_session = pyfluent.launch_fluent(precision="double", processor_count=2, start_transcript=False, mode="solver", cleanup_on_exit=False)

Monitors list is empty now.

>>> monitors_list = solver_session.monitors_manager.get_monitor_set_names()
>>> monitors_list
[]

Monitors list is still empty after reading a case file.

>>> solver_session.tui.file.read_case(import_case)                                                                                               
pyfluent.tui WARNING: Currently calling the TUI commands in a generic manner. Please run `python codegen/allapigen.py` from the top-level pyfluent directory to generate the local TUI commands classes.
The following solver settings object method could also be used to execute the above command:
<solver_session>.file.read_case(file_name = r"C:\Users\hpohekar\AppData\Local\Ansys\ansys_fluent_core\examples\exhaust_system.cas.h5")
>>> monitors_list = solver_session.monitors_manager.get_monitor_set_names()
>>> monitors_list
[]

We get monitors list only after reading a data file or after calling iterate() method.

>>> solver_session.tui.file.read_data(import_data)                          
The following solver settings object method could also be used to execute the above command:
<solver_session>.file.read_data(file_name = r"C:\Users\hpohekar\AppData\Local\Ansys\ansys_fluent_core\examples\exhaust_system.dat.h5")
>>> monitors_list = solver_session.monitors_manager.get_monitor_set_names()
>>> monitors_list
['residual', 'mass-bal-rplot', 'mass-tot-rplot', 'mass-in-rplot', 'point-vel-rplot']

calling iterate() method.

>>> solver_session.tui.solve.set.number_of_iterations(15)
The following solver settings object method could also be used to execute the above command:
<solver_session>.solution.run_calculation.iter_count = 15
>>> solver_session.tui.solve.iterate()
The following solver settings object method could also be used to execute the above command:
<solver_session>.solution.run_calculation.iterate(iter_count = 15)
>>> solver_session.monitors_manager.get_monitor_set_names()
['residual', 'mass-bal-rplot', 'mass-tot-rplot', 'mass-in-rplot', 'point-vel-rplot']

I also verified following source code behavior (shared by user in 1st screenshot). It's working fine.

>>> for monitor_set_name, monitor_set_info in solver_session.monitors_manager._monitors_info.items():
...     print(monitor_set_info["monitors"])                                
... 
['continuity', 'x-velocity', 'y-velocity', 'z-velocity', 'energy', 'k', 'omega']
['mass-bal']
['mass-tot']
['mass-in']
['point-vel']
>>>

[hpohekar]

@seanpearsonuk @tejalprabhu01

@ajain-work and I tried to reproduce this bug and we are able to reproduce this.

It's resolved now.

We will create a PR soon.

Thank you.