Learning Forum

[HHK1992]

Hi everyone,

I am studying the shape optimization of NACA 0012 (2D) using fluent adjoint solver. I have already completed the tutorial (2D Cylinder) in the user manual and made a few trial attempts and everything is fine.
Now, I need to do a more practical one and have checked a number of publications. Based on those, I wish to conduct an optimization study in which,

1) Minimize(Drag coefficient)
2) new lift coefficient>=baseline lift coefficient
3) new area>=baseline area

Can somebody tell me how to impose the third one, that is the area of airfoil after optimization should not be less than that of baseline?
I have already checked the 'design conditions' tab in adjoint solver options. But I am not sure how to use them to get it done.
Thanks in advance.

[Rob]

Looking at the tutorial is there way to set a criteria to be >=  a value? 

[HHK1992]

Hello Sir,

Thank you for the response.

I could not find any options to do that. I think it could be done using the 'design conditions' tab in the options. Though I read about them in the user guide, I am still confused. 

Please let me know if you have some thoughts on this.

 

 

[DrAmine]

You cannot define an observable for that.

[DrAmine]

In Mesh Morphing state or region conditions by using bounds or even scaling /letting Morpher find the best scale factor

[HHK1992]

Hello Sir,

Thanks for the suggestion.

I could not understand it clearly. I am aware that scaling and entity bounds tools in the 'Design tool' menu.

But how do I use it to get the area constraint working?

Could you please elaborate on that?

Thank you.

[DrAmine]

I cannot elaborate more on this as that was just an idea which I guess it might work. 

I will recommend that you use the constraint bounded by surface for your constraint. Just read the same mesh and select the surface to be the constraining wall.

[HHK1992]

Let me try it out. Will update here once I have progress.

Thank you for the suggestions. 

[Aras karimi]

Hello Dear HHK1992,

I also need to create such a design condition for my problem. Were you able to apply this design condition ?

I need help applying this design condition.

Thanks in advance.