## Fluids

Topics relate to Fluent, CFX, Turbogrid and more

• Aras karimi
Subscriber

Hi everyone,

I am optimizing a wing using Fluent's adjoint solver. My geometry is as shown below:

I have a problem, that is, I don't know where exactly the bounding box of the adjoint solver should be placed? Does geometry have to be completely inside it? Should the box be fixed to the leading edge and trailing edge of the wing or should it be spaced?

During the optimization process, the chord length of the wing should remain constant. For the first time, I considered the box from the leading edge and trailing edge with a little distance, which eventually increased the chord length of the wing. How can I fixed the chord length ?

Aras.

• Murari Iyengar
Ansys Employee

Hi, you can draw an edge as the chord line and assign a Fixed Boundary Constraint.

• Aras karimi
Subscriber

My geometry is a three-dimensional wing that is not straight in the span direction and has an angular amplitude. How do I define a line as a Chord line of the wing?

Also, which of the following design conditions should I use to apply this constraint?

There is one more design condition, and that is that the Camber line of the wing must remain constant. How do I apply this?

The subject of applying the design condition in the adjoint solver has taken me a lot of time and I have spent several months on it. It is hoped that together we can solve this problem and continue to help other researchers a lot.

If necessary, I will place the shape of the wing from the leading edge.

Regards.

• Aras karimi
Subscriber

How can I apply these two design conditions on it ?

• Aras karimi
Subscriber

Hi Dear Murari,

I posted the geometry figure. I have two design conditions that I mentioned above: Fixed wing chord length and Fixed wing camber lineI have been working on it for several months but I'm not successful.

I am trying as a last hope. I hope you can help me how to apply them.Just a humble request

Regards.