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Universiti Kuala Lumpur Malaysian Institute of Chemical & Bioengineering Technology - Fluid Mechanics Tutorial 2 Fluid Characteristics & Behavior

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MahainiIm Ruzaily

This document contains a tutorial on fluid mechanics with 14 questions covering topics such as: 1) Definitions of specific gravity, specific weight, and specific volume. 2) Calculations involving specific volume, specific weight, density, and conversions between units. 3) Relationships between density, relative density, and kinematic viscosity. 4) Surface tension, contact angle, and calculations of capillary rise. 5) Shear stress calculations for fluid flow over a plate and in a pipe.

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Universiti Kuala Lumpur Malaysian Institute of Chemical & Bioengineering Technology - Fluid Mechanics Tutorial 2 Fluid Characteristics & Behavior

Uploaded by

MahainiIm Ruzaily
26 views2 pages
This document contains a tutorial on fluid mechanics with 14 questions covering topics such as: 1) Definitions of specific gravity, specific weight, and specific volume. 2) Calculations involving specific volume, specific weight, density, and conversions between units. 3) Relationships between density, relative density, and kinematic viscosity. 4) Surface tension, contact angle, and calculations of capillary rise. 5) Shear stress calculations for fluid flow over a plate and in a pipe.

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fluid mechanics

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tutorial

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This document contains a tutorial on fluid mechanics with 14 questions covering topics such as: 1) Definitions of specific gravity, specific weight, and specific volume. 2) Calculations involving specific volume, specific weight, density, and conversions between units. 3) Relationships between density, relative density, and kinematic viscosity. 4) Surface tension, contact angle, and calculations of capillary rise. 5) Shear stress calculations for fluid flow over a plate and in a pipe.

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© All Rights Reserved
Download as PDF, TXT or read online from Scribd
Download as pdf or txt
26 views2 pages

Universiti Kuala Lumpur Malaysian Institute of Chemical & Bioengineering Technology - Fluid Mechanics Tutorial 2 Fluid Characteristics & Behavior

Uploaded by

MahainiIm Ruzaily
This document contains a tutorial on fluid mechanics with 14 questions covering topics such as: 1) Definitions of specific gravity, specific weight, and specific volume. 2) Calculations involving specific volume, specific weight, density, and conversions between units. 3) Relationships between density, relative density, and kinematic viscosity. 4) Surface tension, contact angle, and calculations of capillary rise. 5) Shear stress calculations for fluid flow over a plate and in a pipe.

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UNIVERSITI KUALA LUMPUR MALAYSIAN INSTITUTE

OF CHEMICAL & BIOENGINEERING TECHNOLOGY

CLD 10603 – FLUID MECHANICS


TUTORIAL 2
FLUID CHARACTERISTICS & BEHAVIOR

1. Define specific gravity, specific weight and specific volume.


(3 marks)
-3 3 3
2. If the specific volume of a gas is 7.0 X 10 cm /g, what is its specific weight in N/m ?
(3 marks)
3
3. The density of oil is 0.85 g/cm . Find its relative density and kinematics viscosity if the
-3
dynamic viscosity is 5 x 10 kg/ms.
(3 marks)
3
4. Find the mass of 300 cm of benzene. The density of benzene is 0.8765 g/mL. What
is the weight of benzene?
(3 marks)
5. What are the density, specific weight and kinematics viscosity of carbon dioxide at a
2
pressure of 250 kN/m absolute, temperature of 0C and dynamic viscosity of 1.7 x
-5 2
10 N.s/m ? (RCO2= 189 J/kg.K)
(5 marks)
2
6. Calculate the density and specific weight of helium at 600 kN/m absolute and 333 K.
(Rhelium = 2077 J/kg.K)
(3 marks)
7. An unknown liquid substance has a mass of 22.2 g and occupies a volume of 45.3
mL. What is the density of the liquid? Determine the specific gravity of the liquid.
(3 marks)

Figure 1

8. Figure 1 shows a drop of liquid on glass. Is the contact angle greater than 90 or less
than 90? What is the termed used to describe the contact angle?
(1 mark)
9. How is surface tension different from pressure? State its dimension and SI unit.
(2 marks)
10. Water has a surface tension of 0.37 N/m. In a 4 mm diameter vertical tube, if the
liquid rises 6.5 mm above the liquid outside the tube, calculate the contact angle.
(3 marks)
11. Find the height to which ethyl alcohol will rise in a glass capillary tube 0.314 mm in
diameter. Density is 790 kg/m , σ = 0.0227 N/m, and  = 0 .
3 o

(2 marks)

1
12. Compute the capillary rise in mm of pure water expected in a 0.8 mm diameter tube.
Given  = 9.804 kN/m and  =0.0742 Nm .
3 -1

(1 mark)
13. A researcher works in a car making company laboratory tried to determine shear
stress at a plate surface for a car body. Previous experiments showed that velocity
2
distribution of a viscous liquid over a fixed plate is u = 0.93y – y with dynamic
viscosity = 0.9 Ns/m . Help him to find shear stress at the plate surface and at y =
2

0.42 m. (u is velocity in m/s and y is the distance from the plate in m.


(4 marks)
14. A test has been conducted to determine the intensity of shear stress on a stainless
steel wall. The wall length is 10 m. Absolute viscosity of the fluid, μ is given as 0.051
Pa.s. The velocity of the fluid is 2.015 m/s at the beginning of the wall (82 mm from
the wall). With the assumption that linear velocity distribution from the wall, determine
2
the intensity of shear stress at the end of the wall at 65 mm from the wall in N/m ?
(2 marks)

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