# Unsteady aerodynamic analysis of Airfoil

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 August 18, 2005, 02:04 Unsteady aerodynamic analysis of Airfoil #1 Kyung-Seok, Kim Guest   Posts: n/a Hi, everyone. I'm trying to analyze unsteady aerodynamic analysis. The model is airfoil. but, 1.How can I do this with "Fluent" ? (I can obtain steady result.) 2.How can I get the "unsteady pressure coefficient"? and I'm beginer in aerodynamics, so can you recommend some reference materials(book,thesis, or website)? Thank you in advance.

 August 18, 2005, 15:12 Re: Unsteady aerodynamic analysis of Airfoil #2 Miqdad Guest   Posts: n/a Well, unsteady analysis are always time dependent. I guess you should be having your airfoil at a reasonable angle of attack to capture those bluff body shedding. Hope this helps!

 August 22, 2005, 15:28 Re: Unsteady aerodynamic analysis of Airfoil #3 helper Guest   Posts: n/a Since you're interested, don't you think you need to do transient simulation? You can activate unsteady option in the "Define/Models/Solver" panel. Choose "Unsteady in the "Time" box, and "2nd-order implicit" in the "Unstesdy Formulation" box. Determine the time-step size so that you have a sufficient number of time steps (>50 e.g.,) per the expected period of the vortex shedding. Use the steady solution as an initial guess for your transient computation. See if there's any tutorial on unsteady flow simulation.

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