[WIP] Multizone adjoints for turbomachinery #2446

joshkellyjak · 2025-02-18T16:22:06Z

Proposed Changes

This is a cleaned up PR of the fixes needed for multizone adjoints for turbomachinery from the previous PR of @oleburghardt and I's work.

This hopefully is useable, so if you would like to test and report please feel free to contact me on Slack.

TODO:

Fix eddy viscosity tape issue in CNSSolver
Add turbomachinery objective functions + constraints
Include MZ testcase

Related Work

Now closed PR #2317

PR Checklist

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[ X ] I am submitting my contribution to the develop branch.
My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
My contribution is commented and consistent with SU2 style (https://su2code.github.io/docs_v7/Style-Guide/).
I used the pre-commit hook to prevent dirty commits and used pre-commit run --all to format old commits.
I have added a test case that demonstrates my contribution, if necessary.
I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.

pcarruscag · 2025-02-20T08:51:45Z

SU2_CFD/include/solvers/CFVMFlowSolverBase.inl

+    AD::EndPreacc();
+
    /*--- Max is not differentiable, so we not register them for preacc. ---*/


What is the difference between ending the preaccumulation before or after?

pcarruscag · 2025-02-20T08:51:59Z

Common/src/CConfig.cpp

+      }
    }
+  } else if (Multizone_Problem && DiscreteAdjoint) {
+      SU2_MPI::Error(string("OUTPUT_WRT_FREQ cannot be specified for this solver "


Suggested change

SU2_MPI::Error(string("OUTPUT_WRT_FREQ cannot be specified for this solver "

SU2_MPI::Error("OUTPUT_WRT_FREQ cannot be specified for this solver "

pcarruscag · 2025-02-20T08:52:47Z

Common/src/CConfig.cpp

+                            "(writing of restart and sensitivity files not possible for multizone discrete adjoint during runtime yet).\n"
+                            "Please remove this option from the config file, output files will be written when solver finalizes.\n"), CURRENT_FUNCTION);


Hmmm I'm pretty sure it is possible

This is one for @oleburghardt

Yes and no, writing the files is fine, but the continuation of the multi-zone discrete adjoint solver is erratic. My guess is that some indices aren't cleared properly before re-recording the tape. (Writing adjoint solution variables to file only, without re-recording at all and without sensitivities, might give us some hints.)
The debug mode could eventually pin down where exactly things go wrong.

pcarruscag · 2025-02-20T08:55:35Z

SU2_CFD/src/solvers/CDiscAdjSolver.cpp

-    BPressure = config->GetPressureOut_BC();
-    Temperature = config->GetTotalTemperatureIn_BC();
-
    if (!reset){
      AD::RegisterInput(BPressure);
      AD::RegisterInput(Temperature);
    }

+    BPressure = config->GetPressureOut_BC();
+    Temperature = config->GetTotalTemperatureIn_BC();
+


Why are these wrong but not the others that follow the same pattern?

This threw a tagging error, and if I remember correctly it's because in the other sections the variables it accesses are directly used in the solver, whereas in the Giles implementation they are not, creating a mismatch in tags.

Can we fix it in a way that keeps a clear pattern for doing this type of thing?

I can give it a go

…ding of objective function calculation

…e_mz_turbomachinery_adjoint

SU2_CFD/src/iteration/CDiscAdjFluidIteration.cpp

SU2_CFD/src/iteration/CTurboIteration.cpp

SU2_CFD/src/solvers/CEulerSolver.cpp

… to run in quasi-MZ approach. (NEEDS CLEANING)

SU2_CFD/src/drivers/CDiscAdjMultizoneDriver.cpp

SU2_CFD/src/integration/CIntegration.cpp

SU2_CFD/src/iteration/CDiscAdjFluidIteration.cpp

… MZ turbo testcase

SU2_CFD/src/drivers/CDriver.cpp

    }
  }

+  //TurbomachineryStagePerformance = std::make_shared<CTurbomachineryStagePerformance>(solver[ZONE_0][INST_0][MESH_0][FLOW_SOL]->GetFluidModel());


The best way to fix this problem is to remove the commented-out code entirely, as there is no explanation for its presence, and no indication that it is meant for documentation purposes. This should be done by deleting line 2733 entirely from SU2_CFD/src/drivers/CDriver.cpp, leaving the code cleaner and more maintainable. No functional impact will occur by removing this line, as it currently does nothing.

Fixes from tagging tool

98989f7

joshkellyjak added PR: draft changelog:feature labels Feb 18, 2025

Config catch + fix preacc in ComputeVorticityandStrainMag

6082eac

oleburghardt mentioned this pull request Feb 19, 2025

[WIP] Multizone discrete adjoints for turbomachinery #2317

Closed

pcarruscag reviewed Feb 20, 2025

View reviewed changes

Initial add turbo obj functions

b3267b6

joshkellyjak mentioned this pull request Feb 25, 2025

Update CTurbSSTSolver.cpp to fix bug on calculating MuT #2453

Merged

6 tasks

Initial refactoring of turboperformance into solver for correct recor…

c459ce9

…ding of objective function calculation

oleburghardt mentioned this pull request Mar 21, 2025

Fix preaccumulation error, improve recording of RANS solvers #2472

Merged

6 tasks

Joshua Kelly added 2 commits March 21, 2025 13:06

Merge remote-tracking branch 'origin/fix_small_AD_issues' into featur…

4a58b8c

…e_mz_turbomachinery_adjoint

Adding geometry to AD recording for turbo calcs. (NOT WORKING CURRENTLY)

1614784

github-advanced-security bot found potential problems May 1, 2025

View reviewed changes

SU2_CFD/src/iteration/CDiscAdjFluidIteration.cpp Fixed Show fixed Hide fixed

SU2_CFD/src/iteration/CTurboIteration.cpp Fixed Show fixed Hide fixed

SU2_CFD/src/solvers/CEulerSolver.cpp Fixed Show fixed Hide fixed

Singlezone working with validated gradients and turbo obj funcs. Need…

d43fef5

… to run in quasi-MZ approach. (NEEDS CLEANING)

github-advanced-security bot found potential problems Jun 9, 2025

View reviewed changes

SU2_CFD/src/drivers/CDiscAdjMultizoneDriver.cpp Fixed Show fixed Hide fixed

SU2_CFD/src/integration/CIntegration.cpp Fixed Show fixed Hide fixed

SU2_CFD/src/iteration/CDiscAdjFluidIteration.cpp Fixed Show fixed Hide fixed

joshkellyjak and others added 8 commits August 25, 2025 11:03

Merge branch 'develop' into feature_mz_turbomachinery_adjoint

6c9de92

Merge branch 'develop' into feature_mz_turbomachinery_adjoint

0e03ead

Messy commit of refactoring

ae2f001

Cleaned up branch + Euler MZ working / Issues with RANS remain + Init…

32956c4

… MZ turbo testcase

Merge branch 'develop' into feature_mz_turbomachinery_adjoint

435bea6

merge issue

912aeea

Unused var

a0bfb53

Unused var

1303145

github-advanced-security bot found potential problems Oct 12, 2025

View reviewed changes

		AD::EndPreacc();

		/--- Max is not differentiable, so we not register them for preacc. ---/

	SU2_MPI::Error(string("OUTPUT_WRT_FREQ cannot be specified for this solver "
	SU2_MPI::Error("OUTPUT_WRT_FREQ cannot be specified for this solver "

		"(writing of restart and sensitivity files not possible for multizone discrete adjoint during runtime yet).\n"
		"Please remove this option from the config file, output files will be written when solver finalizes.\n"), CURRENT_FUNCTION);

@@ -2730,7 +2730,6 @@
                 }
               }
-              //TurbomachineryStagePerformance = std::make_shared<CTurbomachineryStagePerformance>(solver[ZONE_0][INST_0][MESH_0][FLOW_SOL]->GetFluidModel());
             }
             CDriver::~CDriver() = default;

[WIP] Multizone adjoints for turbomachinery #2446

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[WIP] Multizone adjoints for turbomachinery #2446

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joshkellyjak commented Feb 18, 2025

Proposed Changes

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oleburghardt Mar 25, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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oleburghardt Mar 25, 2025 •

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