Flows wtth Drag Reduction (Velocity and Friction) 
As to the remarks of Dr. Huang I would like to stress that 
the model proposed is not based on Virk's data. In particular it is 
not based on Virk's maximum drag reduction curves. The opposite, 
our model suggests that one should not look for a universal maximum 
drag reduction curve. Equations (3) and (4) are not the starting point 
of the analysis and have only been used to obtain the correlation bet- 
ween At and the polymer properties at the end of the paper. If 
Dr. Huang feels that better correlations exist he can use them in- 
stead, and the only equation that will have to be modified is Equation 
26. Thus his conclusions as to the validity of the model are not ac- 
cepted. 
L See 
