F is the same function evaluated with respect to the flow components in the 

 streamline direction as the one used for two-dimensional flows. Thus, 

 according to Green, et al. 



F(H) E 0.025 H - 0.022 (8) 



where 



H = n^ (9) 



^11 



Furthermore, it is assumed that 



where 



6 = e^^(G+H) (10) 



^ ^ (11) 



(H-1) 



Thus, the entrainment parameters, the length scale 6 and the entrainment 



function F, are completely specified in terms of integral thicknesses 



defined by Equations (5a-5f ) . A justification for the foregoing empirical 



9 

 expressions can be obtained from the paper of Cumpsty and Head and its 



antecedents. 



The components C and C of the skin friction coefficient can be ob- 



(j) e 



tained from the skin friction coefficient C^ in the local inviscid stream- 

 line direction by the formulas 



C^ = C^(cos a - sin a tan 3) (Ha) 



