New objective function

khavart · July 3, 2019, 06:06

Hello,

I'm currently optimizing a nozzle in order to have a uniform mach number at the outlet. So by using SURFACE_MACH objective function the uniformity is ok but I need to have a directionnal flow at the outlet (meaning that the velocity vector have to be parallel to the nozzle axis).

So I need to compute a new objective function. The first idea is to modify an existing objective function in order to get rid of output/input problems. So let's say that I want to modify the objective function named SURFACE_TOTAL_PRESSURE.

What are the lines of the code I should modify ? When I searched about it I found many places where it appears so a little help would be helpful.

Thanks,
Kevin

pcg · July 4, 2019, 06:33

Hi Kevin,
It is computed in COutput::SpecialOutput_AnalyzeSurface (along with many other surface quantities).
Regards,
Pedro

khavart · July 9, 2019, 10:17

Hi Pedro,

Thank you very much, I have found all I need.

Once I have modified the code, must I recompile it or something else of this kind ?

Thanks,
Kevin

July 3, 2019, 06:06	New objective function	#1
khavart New Member kevin havart Join Date: Jun 2019 Posts: 8 Rep Power: 6	Hello, I'm currently optimizing a nozzle in order to have a uniform mach number at the outlet. So by using SURFACE_MACH objective function the uniformity is ok but I need to have a directionnal flow at the outlet (meaning that the velocity vector have to be parallel to the nozzle axis). So I need to compute a new objective function. The first idea is to modify an existing objective function in order to get rid of output/input problems. So let's say that I want to modify the objective function named SURFACE_TOTAL_PRESSURE. What are the lines of the code I should modify ? When I searched about it I found many places where it appears so a little help would be helpful. Thanks, Kevin

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[mesh manipulation] refineMesh Error	mohsen.boojari	OpenFOAM Meshing & Mesh Conversion	3	March 1, 2018 22:07
channelFoam for a 3D pipe	AlmostSurelyRob	OpenFOAM	3	June 24, 2011 13:06
latest OpenFOAM-1.6.x from git failed to compile	phsieh2005	OpenFOAM Bugs	25	February 9, 2010 04:37
Compilation errors in ThirdPartymallochoard	feng_w	OpenFOAM Installation	1	January 25, 2009 06:59
Problem with compile the setParabolicInlet	ivanyao	OpenFOAM Running, Solving & CFD	6	September 5, 2008 20:50

July 4, 2019, 06:33		#2
pcg Senior Member Pedro Gomes Join Date: Dec 2017 Posts: 465 Rep Power: 13	Hi Kevin, It is computed in COutput::SpecialOutput_AnalyzeSurface (along with many other surface quantities). Regards, Pedro

July 9, 2019, 10:17		#3
khavart New Member kevin havart Join Date: Jun 2019 Posts: 8 Rep Power: 6	Hi Pedro, Thank you very much, I have found all I need. Once I have modified the code, must I recompile it or something else of this kind ? Thanks, Kevin