# CFD_Prelab2 - Simulation of Turbulent Flow around an...

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1 Simulation of Turbulent Flow around an Airfoil 57:020 Mechanics of Fluids and Transfer Processes CFD PRELAB 2 By Tao Xing and Fred Stern IIHR-Hydroscience & Engineering The University of Iowa C. Maxwell Stanley Hydraulics Laboratory Iowa City, IA 52242-1585 1. Purpose The Purpose of CFD PreLab 2 is to simulate turbulent flow around Clarky airfoil following “CFD process” by an interactive step-by- step approach. Students will have “hands - on” experiences using FlowLab to compute pressure, lift and drag coefficients using both viscous and inviscid models. Students will validate simulation results with EFD data measured at EFD Lab 3, analyze the differences and possible numerical errors, and present results in Lab report. 2. Simulation Design In EFD Lab 3, you have conducted experimental study for turbulent flow around a ClarkY airfoil (Re=300,000) for two angles of attack 0 and 16 degrees. The pressure on the foil surface you have measured Flow chart for ISTUE teaching module for airfoil flow (red color illustrates the options you will use in this CFD PreLab 2) Geometry Post-processing Report Physics Mesh Contours Vectors Streamlines Solve Iterations Conver- gent. Limit Precisions Single Double Numerical Schemes 1 st order 2 nd order QUICK Steady / Unsteady? Coarse Medium Fine Automatic Manual Structured Unstruct- ured Boundary Conditions Flow Properties Viscous Models One Eq. Two Eq. Density and viscosity Laminar Turbulen Inviscid SA k-e k-w Heat Transfer? Incompress -ible? Initial Conditions Clarky NACA12 LS(1) 0417 Import Profile Chord length Angle of attack Select domain Select geometry Wall shear stress Skin friction Factor XY plots Verification and validation Coefficient of lift Coefficient of drag Residuals Pressure coef. Distri. Shear stress Distri. Airfoil Y plus

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2 will be used for CFD PreLab 2. In CFD PreLab 2, simulation will be conducted under the same conditions of EFD Lab 3 (geometry, Reynolds number, fluid properties) at angle of attack 0 degree using both viscous and inviscid models. Simulation results will be validated by your own EFD data. The problem to be solved is turbulent flow around the ClarkY airfoil with angle of attack ( ) In the figure above, C is the chord length of the airfoil, is the angle of attack, and Rc is the radius of the “O” domain .
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## This note was uploaded on 12/08/2011 for the course MECHANICS 57:020 taught by Professor Fredrickstern during the Fall '10 term at University of Iowa.

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CFD_Prelab2 - Simulation of Turbulent Flow around an...

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