Example 6.4 Solution The drag force \( F_{D} \) on an immersed axisymmetric body depends on the maximum dameter \( D \), length \( L \), and speed \( U \) of the body and the viscosity \( \mu \), and density \( \rho \) of the fuid. Extract a functional relationship between these parameters by considering the differental equation and boundary conditions. Agure E6.4.