1) Blood flows through a 0.5 cm diameter artery of 50 cm length. The viscosity of blood can be assumed to be 3 cP. The mean hydrodynamic pressure drop is 17 mm Hg.
a) What is the shear stress of blood at the artery wall dyn/cm^2 ?
b) What is the shear rate of blood at the artery wall?
c) What is the volumetric flow rate of blood in cm^3/s ?
2) You are designing a hollow fiber unit. The flow-rate of blood is assumed to be at high enough a rate that blood behaves as a Newtonian fluid. The fiber diameter is 600 microns and their length is 30 cm. You want a flow-rate of 12 ml/min for each fiber. What should be the pressure drop in mm Hg across the fiber length to achieve this flow-rate? (760 mm Hg= 101,325 N/m^2).