Present results are compared with the results of the Herschel-Bulkley fluid model obtained by Misra and Shit 2006 for the same geometry. The viscosity of the fluid is given by Hagen Poiseuilles formula ii Coaxial Cylinder Viscometer or Concentric Cylinder Viscometer. F A n dv dr where F represents force and A represents area.
R Radius of the capillary tube.
Viscosity is determined by measuring the force ie. Since we typically measure viscosity by watching how quickly something spreads over a certain area this is the formula that is often used. Stay tuned with BYJUS for more such interesting articles. Thus we can express it as.