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-   -   Plot drag coeff,lift coeff VS angle of attack (http://www.cfd-online.com/Forums/fluent/31984-plot-drag-coeff-lift-coeff-vs-angle-attack.html)

John August 18, 2003 04:38

Plot drag coeff,lift coeff VS angle of attack
 
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

mateus August 24, 2003 10:43

Re: Plot drag coeff,lift coeff VS angle of attack
 
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

nikita August 29, 2003 13:06

Re: Plot drag coeff,lift coeff VS angle of attack
 
another suggestion is..for wind tunnel..u set the wall as symmetry


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