Time varying Inlet BC in SU2

argix · June 2, 2024, 07:58

Hi everyone,
I am studying a case of jet impingement on a wall with a time-varying flow at the inlet. I have used compressible RANS and TOTAL_CONDITIONS as inlet BC. Specifically, I have set a time-varying stagnation pressure at inlet.

To do this, I used this Python script http://github.com/su2code/SU2/tree/m...e_unsteady_CHT, modifying some commands to suit my problem. I should mention that I do not use Python frequently, so there are likely some errors. Indeed, I checked the documentation and noticed that the command I used to vary the pressure at the inlet (SetMarkerCustomPtotal) is not listed.

However, when I run the simulation, it seems to work quite well. Unfortunately, when examining the pressure field, it appears that the time-varying boundary conditions are applied on the walls with no-slip conditions (represented by the MARKER_ISOTHERMAL command) and not at the inlet as I want.

Could you please tell me what changes I need to make in the Python script to correctly set up the problem? For completeness, I am attaching the script I modified, the configuration file, and a video of the pressure field.
https://github.com/user-attachments/...unsteady_5.zip

Thank you in advance for your help.

Best Regards.

bigfootedrockmidget · June 2, 2024, 19:31

We do not have setmarkercustomPTotal, so this will not work as intended.

We currently do not even have python customizable inlets it seems. What you could do is have a look at the implementation of SetMarkerCustomTemperature and SetCustomBoundaryTemperature and implement something similar in the inlet boundary condition in the euler solver CEulerSolver::BC_Inlet

OK, I see you also posted this on github, and pcarruscag is on the case, so it should be implemented in 5,4,3,2,...

June 2, 2024, 07:58	Time varying Inlet BC in SU2	#1
argix New Member Alessandro Join Date: Dec 2023 Posts: 1 Rep Power: 0	Hi everyone, I am studying a case of jet impingement on a wall with a time-varying flow at the inlet. I have used compressible RANS and TOTAL_CONDITIONS as inlet BC. Specifically, I have set a time-varying stagnation pressure at inlet. To do this, I used this Python script http://github.com/su2code/SU2/tree/m...e_unsteady_CHT, modifying some commands to suit my problem. I should mention that I do not use Python frequently, so there are likely some errors. Indeed, I checked the documentation and noticed that the command I used to vary the pressure at the inlet (SetMarkerCustomPtotal) is not listed. However, when I run the simulation, it seems to work quite well. Unfortunately, when examining the pressure field, it appears that the time-varying boundary conditions are applied on the walls with no-slip conditions (represented by the MARKER_ISOTHERMAL command) and not at the inlet as I want. Could you please tell me what changes I need to make in the Python script to correctly set up the problem? For completeness, I am attaching the script I modified, the configuration file, and a video of the pressure field. https://github.com/user-attachments/...unsteady_5.zip Thank you in advance for your help. Best Regards.

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June 2, 2024, 19:31		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 679 Rep Power: 21	We do not have setmarkercustomPTotal, so this will not work as intended. We currently do not even have python customizable inlets it seems. What you could do is have a look at the implementation of SetMarkerCustomTemperature and SetCustomBoundaryTemperature and implement something similar in the inlet boundary condition in the euler solver CEulerSolver::BC_Inlet OK, I see you also posted this on github, and pcarruscag is on the case, so it should be implemented in 5,4,3,2,...