Objective Functions

m_cita93 · December 19, 2017, 03:39

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, 09:52

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, 03:39	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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to solve the boundary layer without wall functions?	WhiteW	OpenFOAM Running, Solving & CFD	4	January 20, 2020 04:55
what are the scaling factors of Optimization objective and constraint functions ?	mechy	SU2 Shape Design	4	September 22, 2017 03:23
Shape optimization: EFFICIENCY objective clarification.	fluxCatcher	SU2 Shape Design	0	August 10, 2017 07:39
[Commercial meshers] CCM+ Mesh Conversion	Ingenieur	OpenFOAM Meshing & Mesh Conversion	17	February 2, 2014 09:34
Delta Functions within Ansys Mechanical	Stephen Waite	Structural Mechanics	2	July 29, 2013 08:56

January 2, 2018, 09:52		#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