
(a)
The formula for the viscosity of the liquid.

Answer to Problem 3.177P
The formula for the viscosity of the liquid is
Explanation of Solution
Given information:
The flow rate is
The Figure-(1) shows the section (1) and the section (2) for the given system.
Figure-(1)
Write the expression for the Bernoulli’s equation between the section (1) and section (2) of the given system.
Here, the pressure at inlet is
Write the expression for the head loss due to friction in the pipe region.
Here, the lead loss due to friction is
Since the pressure at the inlet and outlet are same so,
Since the fluid is stationary at section (1), so the velocity of fluid at section (1) is zero.
Write the expression for the height of section (2) from datum.
Substitute
Write the expression for the flow rate at section (2).
Here, the flow rate is
Write the expression for the area at section (2).
Substitute
Substitute
Further solve the above expression.
Conclusion:
The formula for the viscosity of the liquid is
(b)
The viscosity of the fluid.

Answer to Problem 3.177P
The viscosity of the fluid is
Explanation of Solution
Given information:
The diameter of the pipe is
Write the expression for the viscosity.
Calculation:
Substitute
Further solve the above expression.
Conclusion:
The viscosity of the fluid is
(c)
The name of the fluid having viscosity

Answer to Problem 3.177P
The name of the fluid having viscosity
Explanation of Solution
Given information:
The viscosity of the fluid is
Refer to the viscosity table for liquids to obtain the fluid having viscosity
Here, the dynamic viscosity of propyl alcohol is
Thus, the fluid could be propyl alcohol.
Conclusion:
The name of the fluid having viscosity
(d)
Whether the Reynolds number is less than

Answer to Problem 3.177P
Yes, the Reynolds number is less than
Explanation of Solution
Given information:
The diameter of the pipe is
Write the expression for the Reynolds number.
Here, the Reynolds number is
Write the expression for the velocity at section (2).
Substitute
Calculation:
Substitute
Thus, the Reynolds number is
Conclusion:
Yes, the Reynolds number is less than
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Chapter 3 Solutions
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