Objective Functions

m_cita93 · December 19, 2017, 04:39

Hi everyone,

I want to perform shape optimization on a bent pipe with FFD, but I need as objective function the minimization of the pressure drop. Is it possible to implement something like this in su2? If yes, how should I do that?

Thank you,
Martina

Sprotte · January 2, 2018, 10:52

Hi there,

it is already implemented in the current develop-branch, at least if you refer to integral-averaged values for the pressure drop.

Set

MARKER_ANALYZE = ( ... )

to the boundary markers where you want to evaluate the averaged pressure and

OBJECTIVE_FUNCTION = SURFACE_TOTAL_PRESSURE.

You can also easily adapt the calculation of the respective variables (or adding some) - have a look at COutput::SpecialOutput_AnalyzeSurface in output_structure.cpp.

Regards, Ole

December 19, 2017, 04:39	Objective Functions	#1
m_cita93 New Member Join Date: Dec 2017 Posts: 1 Rep Power: 0	Hi everyone, I want to perform shape optimization on a bent pipe with FFD, but I need as objective function the minimization of the pressure drop. Is it possible to implement something like this in su2? If yes, how should I do that? Thank you, Martina

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January 2, 2018, 10:52		#2
Sprotte Member Ole Burghardt Join Date: Mar 2016 Location: Kiel, Germany Posts: 60 Rep Power: 10	Hi there, it is already implemented in the current develop-branch, at least if you refer to integral-averaged values for the pressure drop. Set MARKER_ANALYZE = ( ... ) to the boundary markers where you want to evaluate the averaged pressure and OBJECTIVE_FUNCTION = SURFACE_TOTAL_PRESSURE. You can also easily adapt the calculation of the respective variables (or adding some) - have a look at COutput::SpecialOutput_AnalyzeSurface in output_structure.cpp. Regards, Ole