[mathiyazhaganrj]

I am working on a full aircraft CFD analysis using both Open foam and Fluent. I have a question about the reference area and reference length. Which one should I use: the wing area or the aircraft frontal area? And what about the reference length: is it the chord length or the whole model length? I need to calculate the Lift & Drag and their coefficients.

I would appreciate any help or guidance on this. Thank you.