25 Examples of Fluids

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A fluent It is a type of continuous matter that is made up of some substance whose particles have a weak force of attraction towards each other. For example: mercury, blood plasma and water.

Fluid mechanics is the science that studies the movements of fluids and their interaction with the surrounding environment.

• See also: Liquids

Examples of fluids

1. Oil
2. Water
3. Blood
4. Volcanic lava
5. Paint
6. Mercury
7. Helium
8. Honey
9. Air
10. Milk
11. Lacquers
12. Gasoline
13. Alcohol
14. Acetone
15. Vanilla extract
16. Saliva
17. Jam
18. Ketchup
19. Mayonnaise
20. Yogurt
21. Toothpaste
22. Liquid soap
23. Soup
24. Petroleum

Physical properties of fluids

• Goo. The viscosity in liquids is much greater than in gases. This property is related to the internal tension in the fluid and is linked to the resistance to displacement of the fluid.
• Compressibility. Fluids are less compressible than solids. This property is related to the decrease in volume of bodies when they are compressed.
• Shape memory. Fluids have no shape of their own, so they take the shape of the container that contains them.
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• Deformability. The particles that form a fluid have unbounded movements, so they do not have an equilibrium position.
• Large molecular distance. The distance between the particles that make up a fluid is much greater than the distance between the particles that make up solids.
• Surface tension. It is the energy necessary for the fluid to increase its surface area per unit area.

Types of fluids

Depending on their viscosity, fluids can be:

• Superfluids or perfect fluids. They are characterized by not having viscosity, that is, they can flow without friction. For example: the helium.
• Newtonian fluids. They are characterized by having a constant viscosity. For example: Water.
• Non-Newtonian fluids. They are characterized by not having a constant and defined viscosity value. Its viscosity varies with the temperature and the tension applied to it. For example: a mixture of cornstarch with water.

Depending on their state of aggregation, fluids can be:

• Liquids. They are quite incompressible fluids. They have a defined volume, but no defined shape, so they take the shape of the container that contains them. For example: Water.
• Gases. They are highly compressible fluids. At room temperature, a gaseous substance remains a gas unless its temperature or pressure is changed. For example: molecular oxygen.
• Steam. It is a type of fluid that is formed from the heating of a solid or a liquid. When a substance that is solid or liquid at room temperature is heated to a certain temperature, it transforms into vapor. For example: the water vapor.

Depending on their approach to reality, fluids can be:

• Ideal fluids. They are fluids whose viscosity is considered negligible (zero). Furthermore, they are incompressible (they have constant density), and they flow without eddies or refluxes. For example: water under normal conditions and flowing in a horizontal tube.
• Real fluids. They are viscous and compressible fluids. The position of the particles in these fluids can change continuously. For example: a jam

Follow with:

• Liquids and gases
• Solids, liquids and gases
• Liquids to gases (and vice versa)

References

• Streeter, V. L., Wylie, E. B., Bedford, K. W., & Saldarriaga, J. g. (1988). fluid mechanics (Vol. 7). Colombia: McGraw-Hill.
• Landau, L. D., Lifshitz, E. M., Berestetskii, V. B., & Pitaevskii, L. Q. (2021). Fluid mechanics. I reversed.
• Gerhart, P. M., Gross, R. J., & Hochstein, J. YO. (1995). Fundamentals of fluid mechanics. Addison-Wesley Iberoamericana.
• Sunday, A. M. (2011). Fluid mechanics notes. Polytechnic University of Madrid, 101.