garrick_drag_pitch

Returns Garrick solution for drag coefficient at a specific time. Ref.[1], eq.(9), (10) and (11)

The aerofoil pitching motion is assumed to be:

\[a(t)=A\sin(\omegat)=A\sin(ks)\]

The \(C_d\) is such that:

• \(C_d>0\): drag

• \(C_d<0\): suction