# Plot drag coeff,lift coeff VS angle of attack

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 August 18, 2003, 04:38 Plot drag coeff,lift coeff VS angle of attack #1 John Guest   Posts: n/a Hi. I'm a new user of Fluent 6. Currently,I'm doing a project. I need to plot drag coefficient, pressure coefficient and lift coefficient against angle of attack. I couldn't find the variables in the XY-Plot. May I know how to set up boundary conditions for changing angle of attack. Thanks

 August 24, 2003, 10:43 Re: Plot drag coeff,lift coeff VS angle of attack #2 mateus Guest   Posts: n/a Hi! What you will have to do is make a separate simulation for each angle of attack. The lift and drag coeficients can be obatined from "solve-monitors-force". To change the angle of attack you should create a new mesh each time - but it would probabilly take to long. if you are dealing with airfoil in wind tunnel you can define tunnel walls as periodic boundaries (place them far away from airfoil). This way you consider wing in allmols infinite space (no effect of walls and other objest in its vicinity). Now you can define the inlet velocity in components - vx and vy - for the desired angle of attack. hope this helps MATEUS

 August 29, 2003, 13:06 Re: Plot drag coeff,lift coeff VS angle of attack #3 nikita Guest   Posts: n/a another suggestion is..for wind tunnel..u set the wall as symmetry

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