[nihalranjan.12@gmail.com]

I am doing the simulation for the NACA 0018 using fluent what ever angle I am choosing it is giving the negative cl value. Can any one look in this and suggest some solution, I am attaching the mesh and other files for the reference.
I am using y+=1 and the angle of attack is 15 deg. I am rotating the incoming flow. I am using laminar model as the velocity is 1 m/s so Reynold's number is very low.

if anything more needed then reply.

thanks
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