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RUTGERS BME 125:303
BIOMEDICAL TRANSPORT PHENOMENA
Problem Review II
P. Moghe
Fall 2010
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 in 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 flowrate 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 flowrate of 12 ml/min for each fiber.
What should be the pressure
drop in mm Hg across the fiber length to achieve this flowrate?
(760 mm Hg = 101,325 N/m2).
Make appropriate assumptions as necessary.
3.
Consider the design of a hollow fiber unit for an extracorporeal bioartificial liver. Blood flows
through the lumen of each hollow fiber contained within the device at a flow rate of 400 ml/min.
The unit consists of 10,000 fibers and the lumen diameter of a fiber is 400 microns. The blood
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This note was uploaded on 02/12/2011 for the course BIOMEDICAL 303 taught by Professor Moghe during the Fall '10 term at Rutgers.
 Fall '10
 Moghe

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