Question

Oil, with ?=860 kg/m3 and µ=0.06 kg/m ?s, flows through a
horizontal pipe of 15 m length. The power delivered to the flow is
1 hp. If friction losses are to be neglected and the flow is at the
laminar transition point

(a) What is the appropriate pipe diameter?

(b) For this condition, what are Q in m3/h; and

(c) ?W in kPa?

Answer #1

Oil is flowing through a horizontal pipe
constriction. In the large section, the pipe has a diameter of 1.7
meters and a pressure of 500 kPa. If the pipe constricts to a
diameter of 0.5 meters, what is the pressure in the constricted
pipe section. (Assume the oil flow rate is 65 m3/min
and oil density is 900 kg/m3)
49,432.419 kPa
13.096115 kPa
486.403885 kPa
513.801133 kPa
2. Oil is flowing through a
horizontal pipe expansion. In the small section,...

Oil is flowing through a horizontal pipe constriction. In the
large section, the pipe has a diameter of 1.9 meters and a pressure
of 900 kPa. If the pipe constricts to a diameter of 0.4 meters,
what is the pressure in the constricted pipe section. (Assume the
oil flow rate is 65 m3/min and oil density is 900 kg/m3) 933.509601
kPa 121,028.169 kPa 32.478208 kPa 866.621792 kPa

A 250 mm diameter of cast iron pipe flows 39.3 L/s of
SAE 10 oil along 500 m length. Given: dynamic viscosity, μ and
density, ρ of SAE 10 oil are 1.04 x 10-1 Ns/m2 and 917 kg/m3
respectively. By assuming the flow is laminar, determine energy
head and pressure loss due to pipe friction using Hagen-Poiseuille
equation and friction factor, f.

0.0425 m3/s of heavy oil flows from pt. A (z = 31 m)
to pt. B (z = 21 m) through a 914 m long and 15 cm diameter steel
pipe.
γwater = 9800 kg/m2s2,
νoil (kinematic viscosity) = μ/ρ = 4 cm2/sec,
specific gravity of oil = 0.92.
(a) Is the flow laminar or turbulent?
(b) What is the Head Loss in meters?
(c) If the gage pressure at A is 1065 kPa, what is the gage
pressure at...

A liquid of density 860 kg/m3 flows through a
horizontal pipe that has a cross-sectional area of 1.40 x
10-2 m2 in region A and a
cross-sectional area of 9.40 x 10-2 m2 in
region B. The pressure difference between the two regions
is 6.10 x 103 Pa. What are (a) the
volume flow rate and (b) the mass flow rate?
p.s. please box the final answers.

Air under standard conditions (ñ=1.23 kg/m3, µ=1.79 x
10 -5) flows through a 4- mm diameter drawn tubing with
an average velocity of V = 50 m/s. For such conditions the flow
would normally be turbulent. However if precautions are taken to
eliminate disturbances to the flow (the entrance to the flow is
very smooth, the air is dust free, the tube does not vibrate etc.),
it may be possible to maintain laminar flow.
What is the pressure drop in...

Water, with a density of ?=1185 kg/m3 , flows in a horizontal
pipe. In one segment of the pipe, the flow speed is ?1=7.13 m/s .
In a second segment, the flow speed is ?2=1.57 m/s . What is the
difference between the pressure in the second segment ( ?2 ) and
the pressure in the first segment ( ?1 )?
P2-P1 =
A liquid of density 1110 kg/m3 flows steadily through a pipe of
varying diameter and height. At...

Water flows through a horizontal pipe at a rate of 2.3 m3/s. A
pressure gauge placed on a 40 cm diameter section of the pipe reads
210.3 kPa. What is the gauge pressure in a section of pipe where
the diameter is constricted to 35 cm and what has caused this
change in pressure?

Water is flowing at the rate of 1.676 m/s in a 3.068 inches’
diameter horizontal pipe at a pressure p1 of 68.9 kPa. It then
passes to a pipe having an inside diameter of 2.067 inch. The
density of the water is 998 kg/m3 . a) Calculate the new pressure
p2 in the 2.067inch pipe. Assume no friction losses b) If
the piping is vertical and the flow is upward, calculate the new
pressure p2. The pressure tap for p2...

1-
Water flows in a 10 m long and 4 cm diameter pipe
contains 4 elbows ( KL= 0.2 ) at velocity 8 m/s.
Calculate the total head losses when the friction factor
f=0.03
35.56 m
22.07 m
27.07 m
15.46 m
2- water flows in a 10 m long and 5 cm diameter
horizontal pipe at rate 15 l/s
Calculate the pressure drop
Take the density of water 1000 kg/m3 and the
dynamic viscosity 0.001 kg/m.s
74.13 kPa
96.41...

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