Task (4) a) Explain the operation and constrains of the following viscometers. 1. Falling Ball Viscometer 2. Vibro-viscometer 3. Rotational Viscometer 4. Saybolt Viscometer b) Explain how the increase of temperature affects the viscosity of liquids and gases. c) Explain, with examples, the effect of shear forces on Newtonian and non-Newtonian fluids.
Task (4) a) Explain the operation and constrains of the following viscometers. 1. Falling Ball Viscometer 2. Vibro-viscometer 3. Rotational Viscometer 4. Saybolt Viscometer b) Explain how the increase of temperature affects the viscosity of liquids and gases. c) Explain, with examples, the effect of shear forces on Newtonian and non-Newtonian fluids.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
https://www.engineeringtoolbox.com/dynamic-viscosity-motor-oils-d_1759.html
Transcribed Image Text:Task (4)
a) Explain the operation and constrains of the following viscometers.
1. Falling Ball Viscometer
2. Vibro-viscometer
3. Rotational Viscometer
4. Saybolt Viscometer
b) Explain how the increase of temperature affects the viscosity of liquids and gases.
c) Explain, with examples, the effect of shear forces on Newtonian and non-Newtonian fluids.
Task (5)
You have performed an experiment on Saybolt Viscometer to determine the viscosity of SAE 10 Oil at
different temperatures and you got results as shown in the following table:
Temperature
(C)
SU (min)
P (ke/m^3)
20
0:09:30
880
30
0:04:40
872
40
0:03:15
866
50
0:02:21
862
60
0:01:42
860
70
0:01:22
859
80
0:00:58
858.5
90
0:00:51
858
a) Determine the absolute viscosity at each temperature and plot it against temperature.
b) Determine the percentage error of your results at 20 °C and 50 °C by comparing them with
reference values in this link: https://www.engineeringtoolbox.com/dynamic-viscosity-motor-
oils-d 1759.html. Is this experiment reliable to measure viscosity of SAE Oils?
c) Determine the dynamic viscosity at 63 °C by:
1. Temperature-viscosity equation
2. Linear interpolation method
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