Presentation - newtonian and non-newtoian fluids

1. Introduction
What is newton and Non-newton fluid ?
What is contact between share rate and
Shear stress in both of them ?
What is relation between Viscosity and newton
and non-newton fluid ?
What is relation between Viscosity and share
stress and share rate?

2. What is viscosity?
 resistance of a fluid (liquid or gas) to a change in
shape, Viscosity is a measure of a fluid's resistance
to flow.
 It describes the internal friction of a moving fluid A
fluid with large viscosity resists motion because
its molecular makeup gives it a lot of internal
friction. A fluid with low viscosity flows easily
because its molecular makeup results in very little
friction when it is in motion.

3. How can measure viscosity? w can
• We can measure
viscosity quantitatively by
measuring the rate at which a
metal ball falls through a
substance. The slower it falls,
the more viscous the liquid.

4. Factor that determine viscosity
1. strength of intermolecular
forces

5. Factor that determine viscosity
2. size and shape of the molecule

6. Factor that determine viscosity
 Temperature

7. How change viscosity of liquid with
temperature?
The viscosity of liquids decreases rapidly
with an increase in temperature, and the
viscosity of gases increases with an
increase in temperature.

8. Newtonian fluids

9. Example
Water
Organic solvent (Alcohol)
Honey

12. Non-Newtonian fluids
(physics) A fluid whose stress at each point is not linearly
proportional to the strain rate at that point; i.e. its viscosity
depends on the applied shear force.

14. Applications of Non-Newtonian fluids
 Safety - creating body vest / armours that behave like
non-Newtonian fluids for Police or Military uses.
 Medicine - understand more about our body and improve
health techniques.
 Non-Newtonian fluid sport shoes.
 In food industry - ketchup , jam

15. non
newtonian
time
depended
thioxotropi
c
rheopectic
time
independed
dilatan
pseudoplasti
ce

16. Time depend:
Rheopectic - Fluids whose viscosity increases with time under constant.
example: Gypsum paste
Fluids whose viscosity decreases with time under constant.
example: printer ink
Thixotropic -

17. Time in depend
Dilatant - Fluid whose viscosity increases as the force applied on the fluid.
example: corn starch with water
Pseudo plastic -
Fluid whose viscosity decreases as the force applied on the fluid.
example: ketchup

18.  Deference between Newtonian and non-Newtonian
• Newtonian: The viscosity is independent of the shear rate
non-Newtonian : There is not constant and is dependent on the shear rate.
• Newtonian: obey Newton's law of viscosity
non-Newtonian: do not follow Newton's law
• Newtonian liquid which have simpler molecular formula and low molecular
weight
non-Newtonian: Material with complex structure and high molecular weight
• Newtonian: Relation between shear stress and shear rate is linear.
non-Newtonian: Relation between shear stress and shear rate is not linear.

19. Deference between Newtonian and non-
Newtonian
 Definitions
 Components
 Share stress and share rate
 Time
 Examples

21.  Refrence :
• Encyclopedia Britannica. 2021. viscosity | Definition, Facts, Formula, Units, &
Examples. [online] Available at:
https://www.britannica.com/science/viscosity [Accessed 8 March 2021].
• Google Books. 2021. Non-Newtonian Flow and Applied Rheology. [online]
Available at:
https://books.google.iq/books?id=_6nnoh9PtF0C&printsec=frontcover&dq=wh
y+is+newtonian+and+non+newtonian+fluids+is+important+for+chemical+engin
eerings&hl=en&sa=X&ved=2ahUKEwiGjcWFs5vvAhVxx4sKHTYgBS4Q6AEwAHoEC
AQQAw#v=onepage&q&f=true [Accessed 8 March 2021].
• limited, 2021. Newtonian and non Newtonian behaviour of fluids. [online]
Slideshare.net. Available at:
https://www.slideshare.net/mobile/shahzad_ali27/newtonian-and-non-
newtonian-behaviour-of-fluids [Accessed 8 March 2021].
• Google.com. 2021. [online] Available at:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.scien
celearn.org.nz/resources/1502-non-newtonian-
fluids&ved=2ahUKEwibsbqs4aHvAhXNxIUKHU6PAZcQFjAhegQIHxAC&usg=AOvVa
w0DRqKKQDJr9q74L8FGsm3U [Accessed 8 March 2021]

22. • Cite This For Me. 2021. Save Time and Improve your Marks with
CiteThisForMe, The No. 1 Citation Tool. [online] Available at:
https://www.citethisforme.com/ [Accessed 8 March 2021].
• Google.com. 2021. [online] Available at:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://link.spring
er.com/chapter/10.1007/978-1-4419-6494-
6_1&ved=2ahUKEwibsbqs4aHvAhXNxIUKHU6PAZcQFjApegQIIhAD&usg=AOvVaw1
JmKgBH356IyD8EfdLIpaN [Accessed 8 March 2021].