[khavart]

Hello,

I post this thread because I have some questions about Objective functions available in SU2.



My goal is to optimize a Nozzle in order to have a uniform Mach number at the outlet and minimizing losses.



First of all I've seen that many objective functions were implemented but I don't know what these functions exactly mean. For example what represent Efficiency and Surface_Mach functions ? Those could be interessant for me.



And if there are no objective functions already implemented in SU2 for my problem, do you know if it is possible to implement custom objective function ? (I don't know C langage at all)


Thanks,
Kevin

[nitish_anand]

Hey Kevin,

You can use ENTROPY_GENERATION. To use this objective you need to set up your nozzle as Turbomachinery problem. And is not difficult, look into the tutorials.

Thanks,
Nitish

[khavart]

Hey Nitish,

Thanks for your answer, Trying to do this I've have a segmentation fault (core dumped), is there any change to do in my mesh file to be able to use turbomachinery settings ?


And have you an idea for the uniformization of the mach number ?

Thanks,
Kevin

[nitish_anand]

Hey Kevin,

You need TURBOMACHINERY_KIND and TURBOMACHINERY_MARKERS() in config to enable turbomachinery features.

By uniformation, I guess you mean averaging kinds, yes there are several implemented. Please look into the tutorials or config_template and you will find them.

Thanks,
Nitish