2.10 The flow of a liquid in a 2-in. diameter steel pipe produces a pressure drop due to friction of 72.68 kPa. The length of pipe is 40 m and the mean velocity is 3 m/s. If the density of the liquid is 1000 kg/m², then a) Determine the Reynolds number. b) Determine if the flow is laminar or turbulent. c) Compute viscosity of the liquid. d) Estimate the temperature, if the liquid is water. e) Compute the mass flow rate.
2.10 The flow of a liquid in a 2-in. diameter steel pipe produces a pressure drop due to friction of 72.68 kPa. The length of pipe is 40 m and the mean velocity is 3 m/s. If the density of the liquid is 1000 kg/m², then a) Determine the Reynolds number. b) Determine if the flow is laminar or turbulent. c) Compute viscosity of the liquid. d) Estimate the temperature, if the liquid is water. e) Compute the mass flow rate.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:2.10
The flow of a liquid in a 2-in. diameter steel pipe produces a pressure drop due to friction
of 72.68 kPa. The length of pipe is 40 m and the mean velocity is 3 m/s. If the density of
the liquid is 1000 kg/m², then
a) Determine the Reynolds number.
b) Determine if the flow is laminar or turbulent.
c) Compute viscosity of the liquid.
d) Estimate the temperature, if the liquid is water.
e) Compute the mass flow rate.
A single- cylinder rotational viscometer is used to measure a liquid with viscosity of 100
cP using a spindle with 6-cm length and 1-cm radius. At maximum shear rate (rpm=60),
the measurements approach a full-scale reading of 100. Determine the spindle dimensions
that will allow the viscometer to measure viscosities up to 10,000 cP at maximum shear
2.11.
rate.
2.12.
A
is being used to transport a liquid food product (p = 1000 kg/m³, µ = 1.5 cP) from
pump
a holding tank to a filling machine at a mass flow rate of 2 kg/s. The liquid level in the
holding tank is 10 m above the pump, and the filling machine is 5 m above the pump.
There is 100 m of 2-in. nominal diameter sanitary pipeline between the holding tank of the
filling machine, with one open globe valve and four medium-sweep 90° elbows in the
system. The product is being pumped through a heat exchanger with 100 kPa of pressure
drop due to friction before filling. Determine the theoretical power requirement for the
pump.
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