ENGR 320 HW 1 Fluid Mechanics I need you to answer these 5 fluid mechanics questions. ENGR 320 HW1 Due On 1/25/2019 Grading criterial: Each problem will be
ENGR 320 HW 1 Fluid Mechanics I need you to answer these 5 fluid mechanics questions. ENGR 320
HW1
Due On 1/25/2019
Grading criterial: Each problem will be graded according to the following items: (1) Problems solving
process (70%); (2) Dimensions and Units (10%); (3) Calculation errors (10%) and (4) Neatness (10%)
P1 Calculate the density of the gas in lbm/ft3 with the following given condition, pressure = 60 psi, R =
1716 ft·lbf/slug ·oR, T = 180 oF.
P2 Henri Darcy, a French engineer, proposed that the pressure drop p for flow at velocity V through a
tube of length L could be correlated in the form
p
LV 2
If Darcy’s formulation is consistent, what are the dimensions of the coefficient α?
P3 Investigate the consistency of the Hazen-Williams formula from hydraulics:
Q 61.9D
2.63
p
L
0.54
Q: flow rate, D: diameter of pipe, L: length of pipe and p is the pressure drop
(a) What are the dimensions of the constant “61.9”?
(b) Can this equation be used with confidence for a variety of liquids and gases?
P4 If a liquid has a specific gravity of 1.7, (the density of water is 1000 kg/m3 at 4oC)
(a) What is the density in slugs per cubic feet?
(b) What is the specific weight in lbf per cubic feet?
P5 A tank contains 9 kg of CO2 at 20 oC and 2.0*106 Pa. Estimate the volume (in m3) of the tank.
1
Table A.3
Appendix C
2
3
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