EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
9th Edition
ISBN: 9781119321453
Author: Sonntag
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Question
Chapter 1, Problem 1.65P
To determine
The pressure on either side of the valve and the final pressure at the valve location when the valve is opened.
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Q3.1. A two-fluid manometer is used to measure the pressure difference for flowing blood in a
laboratory experiment as shown in Figure 3.1. Calculate the pressure difference between points A
and B in the fluid. Assume that the density of blood is 1050 kg/m3 and the density of water is 1000
kg/m3.
Water
d2 = 190 mm
d, = 500 mm
d3 = 275 mm
A
Blood
Figure 3.1
1. Consider the following diagram. The fluid flowing in the pipe is oil (SG = 0.830). The fluid in the
manometer is water (SG = 1.00).
Water, pw = 1000 kg/m³
7 cm
Oil, p = 830 kg/m³
a. Determine P₂ - P₁ in kPa.
b. Determine the direction of flow. (Left to right, or right to left). Explain why this is the
case.
c.
The height of oil between the manometer and the pipe is unknown. Explain how you
can still solve the problem without knowing this height. Would this height ever matter?
Hint: consider practical issues of design. Could the height be 0 cm? Could it be
1000 cm?
1. Two pipes A & B caries an oil of specific gravities 0.9 & 1.2 respectively. The center of the pipe A is 75 cm above the pipe B. The height of oil in right limb is 35 cm. Also, the mercury level difference is found in right limb as 60 cm. Find the pressure difference between these two pipes in kPa. Also find the pressure equivalent in water head in mm.
A. The difference of pressure between two pipes (PA-Pa) (Unit is in kPa) =
B. Equivalent to Water head in mm =
Chapter 1 Solutions
EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
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