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Negative Drag coefficient naca 0012 airfoil using fluent 15

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March 2, 2015, 21:36	Negative Drag coefficient naca 0012 airfoil using fluent 15	#1
lucasvfc New Member Lucas Vinicius Fernandes Coelho Join Date: Mar 2015 Posts: 3 Rep Power: 11	Hi, I'm new in CFD and I have a problem, in my simulation the drag coefficient of a naca 0012 is negative, as I increase the speed angle of attack, the drag coefficient decreases and becomes negative, I don't now why, I'm pretty sure that my velocity components are OK. I'm use the k-omega model for a Re=3e06. I need help. And I want to know if fluent have a way to rotate only the airfoil or the mesh, without I need to use the velocity components to change the angle of attack. Thanks p.s.: Sorry for my english

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