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A Newtonian fluid with a density of 1290 kg/m3 and a viscosity of 88.4 mPa.s flows...

A Newtonian fluid with a density of 1290 kg/m3 and a viscosity of 88.4 mPa.s flows in a hydrodynamically smooth, horizontal pipe that is 38 mm in diameter at a flow rate of 1.7 L/s.

a)   The pressure gradient will be?

b)   by what factor does the pressure gradient change if the pipe diameter is increased by 1.5 times (i.e. to 57 mm)?

c) Considering the system described in Q01, by what factor does the pressure gradient change if the fluid density is decreased by 10%?

d) Considering the system described in Q01, by what factor does the pressure gradient change if the viscosity is decreased by 40%?

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