Hoyt and Fabula 



100 



80 - 



60 



B^ 



5 40 



20 - 



5 10 50 



POLYMER CONCENTRATION,WPPM 



Fig. 15 - Drag reduction curves for poly(ethylene 

 oxide in blowdown pipe apparatus 



100 



100 

 90 - 

 80 - 



95 70 



Q 60 



I- 



§50 



LlI 



q: 40- 



o 

 g 30 



20 - 



10 - 

 



0.1 



M/SEC 



610 



9.15 

 12.20 

 15.25 

 18.30 

 21.35 



21.35 M/SEC - 



0.46 CM ID PIPE 



10 100 



POLYMER CONCENTRATION, W PPM 



1,000 



10,000 



Fig. 



16 - Friction reduction curves for poly(ethylene oxide) 

 in pipe -flow apparatus 



970 



