Hello,

As part of my Aircraft Design Project I am doing CFD on an NLF airfoil with varying AoAs and Aileron/Flap settings. The airfoil with 0 aileron and flap deflection works fine - meshed and ran in fluent without errors. My problem is with the airfoils with aileron and flap deflections.

I meshed the airfoil with a -2 deg deflection of the aileron the similar to how I did the airfoil with no deflection, however when checking the grid in fluent with the meshed airfoil with aileron deflection I get a Failed grid check error due to negative volumes.

Are there any suggestions as to how I may remedy this? What I have tried thus far is changing the mesh size/type with no luck.

Thanks in advance!

Hi,

Check the skewness of the face meshes.

Try to bring them down below .7

Should work fine.

Thanks

Regards

Rohan

Thanks for the response. I've actually figured it out a while a go and have moved on from the airfoil to the fuselage.

Thanks again though