Question

(Laminar flow) Asphalt at 120°F, considered to be a Newtonian fluid with a viscosity 88,000 times that of water and a specific gravity of 1.60, flows through a pipe of diameter 2.00 in. If the pressure gradient is 1.64 psi/ft, determine the flowrate assuming the pipe is (a) horizontal (ft3/s) (b) vertical with flow up (ft3/s)

Answer #1

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...

A circular, horizontal tube iwth r = 1 inch and L= 10 ft
contains asphalt (? = 70 lbm/ft3 and µ = 67.1 lbm/ft s). A pressure
gradient of 10 psi is applied and the asphalt begins to flow.
Assuming that asphalt is a Newtonian fluid (which it sometimes is
not) calculate the volumetric flow rate of the asphalt leaving the
tube. Give your final answer in gpm.
Answer should be 0.58 gpm

A fluid of viscosity 0,002 N-s /m2 and density 1000 kg/m3 flows
with an average speed of 1 m/s in a 2 cm-diameter horizontal smooth
pipe . Calculate
a)magnitude of shearing stress at the pipe wall.
b) shear stress velocity of flow
c) magnitude of pressure gradient to induce flow

Consider a horizontal pipe in which a viscous fluid is moving at
a laminar flow. The pressure drop across a 0.2-cm ID pipe was
measured at 18,000 Pa/m. The fluid has a rho= 1110 kg/m3 and mu=
0.03 kg/m-s. Determine the equation that defines the velocity
profile vz(r).Then, calculate the velocity at the center of the
pipe (vzat r = 0 in m/s).

A fluid with SG:0,888 and viscosity:0,8 Pa s
flows in horizontal pipe of diameter:5 cm and length:40 m.The
measured velocity profile is of parabolic shape.The amount of
pressure difference between inlet and exist of the pipe is 648,76
kPa.Determine Reynolds number of flow if the pipe is inclined at an
angle 30 degree with horizontal and flow is upward with the same
pressure difference is
applied

Motor oil at T=-30 deg F has a kinematic viscosity of
ν=0.11ft2/s and a specific gravity of SG=0.88. (The rest
of this is made up numbers and may not be indicative of actual car
engine behavior) Assume that the oil flows at a velocity of V=2ft/s
through a cast iron conduit within the engine block. Treat the
conduit as a “best case roughness” (use smallest number for ε if
needed) cast iron pipe with a diameter of 0.5in and a...

2. (25pts) Motor oil at T=-30 deg F has a kinematic viscosity of
ν=0.11ft2/s and a specific gravity of SG=0.88. (The rest of this is
made up numbers and may not be indicative of actual car engine
behavior) Assume that the oil flows at a velocity of V=2ft/s
through a cast iron conduit within the engine block. Treat the
conduit as a “best case roughness” (use smallest number for ε if
needed) cast iron pipe with a diameter of 0.5in...

A grey body is one whose absorptivity
1. does not vary with temperature and wavelength of the incident
ray
2. is equal to its emissivity
3. varies with temperature
4. varies with wavelength of the incident ray
A liquid is in equilibrium with its vapor at its boiling point.
On an average, the molecules in the liquid and gaseous phases have
equal
1. potential energy.
2. kinetic energy.
3.temperature. 4. intermolecular forces of attraction.
A liquid of density 1000 kg/m3...

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