4.11.6

Non-Newtonian Fluids

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Non-Newtonian Fluid Flow

Non-newtonian fluids are fluids have interesting properties and behave differently to fluids you may be familiar with.

Newtonian fluids

Newtonian fluids

  • Newtonian fluids have a constant viscosity that is independent of the change in stress applied to the fluid over a period of time.
  • Most fluids you are familiar with are newtonian, like water.
    • Water has a constant viscosity and flows in a predictable manner.
Non-newtonian fluids

Non-newtonian fluids

  • Non-newtonian fluids do not have a single, constant viscosity throughout the fluid.
  • The viscosity of a non-newtonian fluid depends on the force (and therefore stress) applied to the object.
Cornstarch solution

Cornstarch solution

  • You can easily make your own non-newtonian fluid by combining cornstarch and water.
  • The resulting slime has a viscosity that depends on the force you apply to it.
    • If you forcefully push the slime with your fingers, the viscosity is so high it almost feels solid.
    • If you gently scoop the slime, it flows through your hands like cake batter!
Ketchup

Ketchup

  • Another example of a non-newtonian fluid is ketchup.
  • Ketchup is notoriously hard to dispense from a glass bottle.
  • Ketchup flows more smoothly out of the bottle after applying a force to the upturned end.
    • This is because the viscosity of the ketchup is decreased by applying the force to it.
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Principles of Science I

1.1

Structure & Bonding

1.2

Properties of Substances

1.3

Cell Structure & Function

1.4

Cell Specialisation

1.5

Tissue Structure & Function

1.6

Working with Waves

1.7

Waves in Communication

2

Practical Scientific Procedures and Techniques

3

Science Investigation Skills

4

Principles of Science II

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Extracting Elements

4.2

Relating Properties to use of Substances

4.3

Organic Chemistry

4.4

Energy Changes in Industry

4.5

The Circulatory System

4.6

Ventilation & Gas Exchange

4.7

Urinary System

4.8

Cell Transport

4.9

Thermal Physics

4.10

Materials

4.11

Fluids

5

Contemporary Issues in Science

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