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Dynamic similarity and coefficient

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Old   January 7, 2007, 00:58
Default Dynamic similarity and coefficient
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KB
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Hello,

I have some questions regarding dynamic similarity and how to make use of cd/cl from my cfd code results.

Supposed I do a simulation of an airfoil at Re=1000. The NS eqn have been non-dimensionalised and the chord is 1 unit, u inlet (infinity) is also 1 unit. Length has been non-dimensionalised by meter and time by second.

For this simple example, assume the cl/cd I get at 5deg AoA are 1.5 and 0.05.

Now I would like to find out how much lift/drag force I'll get for an actual test model, neglecting 3d effects. Its

u infinity is 5m/s, chord at 0.05m, width=0.15m. of cos, Re=1000.

Force=(cd or cl)*rho*vel^2*area. To compute lift, F(l)= 1.5*1.2*(5*5)*0.15*.05. Newton. Is that correct?

Thanks

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