Learning Forum

[Stag]

Hello,

 

I would like to simulate the air flow around a rotating cylinder to highlight the Magnus effect.

I managed to get a good simulation with a 2D simulation, thanks to some tutorial out here, but I can't manage to do it in 3D.

I followed this tutorial :

Except that I only put one cylinder and it was not an elliptical one, but everything else is the same. However, when i want to rotate my cylinder, I would use the "rotating wall" option like I did in my 2D simulation, but it doesn't work. I didn't really know what to rotate so I tried with everyone of my walls.

This is my 2D simulation :

 

Quite what i wanted, however when i try in 3D I get this :

 

Which clearly shows my cylinder is not rotating. When I want to rotate my wall, I have this menu :

 

And this "shadow" thing is the only thing I can try to rotate. I'm quite new to Ansys so I do not know what I should do without help, so I'd really appreciate it if someone could help me.

 

Thanks,

[Rob]

How many volumes have you got? A shadow wall implies there's something on the other side of the wall. 

[Stag]

Only 2, one volume for my big "box" supposed to simulate my fluid and an another one for my cylinder.

[Rob]

You have a fluid and a solid, or two fluids? 

Have a look at the reference frame tutorials in the documentation. 

[Stag]

I have one fluid and my cylinder is a solid.

 

I'll check that thanks