1)A power law fluid has a power law exponent of 0.9 reads a certain shear rate value at a certain shear stress value. If the shear stress has been doubled, find out the relation of apparent viscosities for the two cases

2)Two pipes made of same steel material having a density of 7.8 g/cc. One pipe has an inside diameter of 6.18 inches and weight of 29 ppf (pound per foot), and the other one has an outside diameter of 9.63 inches and weight of 47 ppf. One pipe is being entered inside the other one exactly at the center of the pipe. A liquid with density of 1.6 g/cc and viscosity of 45 cp has been pumped in the annulus between the two pipes. If the flow rate was measured to be 1000 bbls/d, determine the flow regime of this liquid at the above stated conditions.

3)A Bingham Fluid A has density of 12.0 ppg (pound per gallon) and viscosity of 18 cp is being circulated inside a pipe at a velocity of 30 ft/sec. Calculate the following:
a) If Fluid A reads 16 and 22 at 100 and 200 rpm speeds respectively at a rotational viscometer, Calculate yield point of the fluid, and rotational viscometer readings at 300 and 600 speeds. Note: use the above viscosity as a plastic viscosity.
b) Another Bingham Fluid B that has a density greater than that of Fluid A by 30% is being circulated at the same pipe at a velocity less than that of Fluid A by 20%. If exactly same flow regime was observed for both fluids, calculate the viscosity of Fluid B that makes Fluid B behaves same as Fluid A.
c) Using the same information above for both fluids, calculate pipe diameter at which both fluids flow behave as a laminar flow behavior. Note: you must calculate pipe diameter required for both fluids separately.




where can i find those kind of problems (drilling books)?