Problem10.21:
Oilflowsdownwardinapipeataslopeof30degreeswiththegivenproperties.
Findthepressuregradientalongthepipe(psf/ft).
Given:
V=2ft/s
D=0.1ft
=102lbfs/ft2
=0.0057ft2/s
S=0.9
Equations:
p 8Vavg
sin
L
R2
R
V
D
Solution:
p 8(2 ft s)(102 lbfs / ft 2
Problem: Calculate the density and specific weight of carbon dioxide at a pressure of
300 kN/m2 absolute and 60C.
Given:
(a)
(b)
(c)
(d)
Carbon dioxide
RCO2 = 189 J/kgK (from Table A.2 - Crowe, et al., 2009)
T = 60C
P = 300kPa
Equations and Assumptions:
(
Complete 8.4, 8.7, and 8.31 in the Crowe, et.al. book. Also complete the following:
Problem: Given the cross-section below, find the critical depth if the flow through
the section is equal to 0.5 m3/s and the top width is 1m.
1m
yc=?
65
65
Problem: For ea
Problem: It takes a certain length of time for the liquid level in a tank of diameter
D to drop from position h1 to position h2 as the tank is being drained through an
orifice of diameter d at the bottom. Determine the -groups that apply to this
problem.
Problem: Determine the change in the kinematic viscosity of air that is heated from 10C
to 70C. Assume standard atmospheric pressure.
Given:
(a) T1 = 10C
(b) T2 = 70C
Equations and Assumptions:
(1) From Table A.3, v70 = 1.99x10-5 m2 /s
(2) From Table A.3,
Problem1:
Forthesystembelow,findtheflowrateifthefluidisoilat20degreesC.Assumethe
densityis97kg/m3andthedynamicviscosityis0.29Ns/m2.Checkwhetheryour
analysisisvalidbasedontheflowregime.
Given:
917kg / m 3
0.29N s / m 2
T 20C
Equations:
p
V12
V2
z1 2 2
Problem: At a temperature of 60F, what pressure must be imposed in order for water to
boil.
Given:
(a) Water at a temperature of 60F
Equations and Assumptions:
(1) From Table A.5, Pv = 0.256 psia
Solution:
Cavitation (boiling) of water occurs when the loc