The Effect of Additives on Fluid Friction 



100 



»?80 



z" 



o 



I- 

 o 



g60 



iLl 



e) 

 ^40 



Q 



20 



10' 



10* 10' 



PIPE FLOW REYNOLDS NO. 



Fig. 19 - Reynolds number correlation 

 for pipe flow 



100 150 200 



CONCENTRATION, WPPM 



Fig. 20 - Effect of high surface roughness 

 on the percent torque reduction with the 

 45.7 cm diameter disk 



973 



