The Effect of Additives on Fluid Friction 

 4 

 3 



2|- 



0.01 



9 

 8 

 7 



6 - 

 5 - 



4 - 



2 - 



0.001 



5 6 7 8 9 



10° 10 ' 



REYNOLDS NUMBER BASED ON WATER 



Fig. 13 - Torque coefficient as a 

 function of Reynolds number 



HIGH PRES. 

 AIR — 



3 



REGULATOR 



fr=<^ 



TANK 

 I 



OPOS. DISPL. 

 PUMP 



TANK 

 2 



=<»=t 



^1 



iTAP 



jb h 



,02-CM-ID PIPE WITH SIX PRES. TAPS 



TUBE INLET CONTRACTION 



TANK 3 



MIXING 

 TANK 



Fig. 14 - Schennatic diagram of blowdown pipe apparatus 



969 



