Chemical Engineering - Fluid Mechanics - Discussion

Discussion Forum : Fluid Mechanics - Section 6 (Q.No. 21)
21.
Quicksand is an example of a __________ fluid.
bingham plastic
dilatent
Newtonion
pseudoplastic
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
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Lokiiii said:   2 years ago
Newtonian Fluids: Air, water, mercury, glycerine, kerosene, and other engineering fluids under normal circumstances. Pseudoplastic: Fine particle suspension, gelatine, blood, milk, paper pulp, and polymeric solutions such as rubbers, and paints. Dilatant fluids: Ultra fine irregular particle suspension, sugar in water, aqueous suspension of rice starch, quicksand, butter printing ink. Ideal plastics or Bingham fluids: Sewage sludge, drilling muds. Viscoelastic fluids: Liquids solid combination in pipe flow, bitumen, tar, asphalt, and polymerized fluids with drag reduction features.

Thixotropic: Printer’s ink, crude oil, lipstick, certain paints, and enamels. Rheopectic fluids: Very rare liquid-solid suspensions, gypsum suspension in water, and bentonite solutions.

Quick Sand and Dilatant Fluid Quicksand is a type of soil that behaves like a fluid when it is saturated with water. It can be dangerous because when a person or object steps onto it, the sand loses its ability to support the weight and begins to liquefy, causing the person or object to sink. Quicksand can be classified as a dilatant fluid because of its unique behavior.

Dilatant Fluid Dilatant fluids are materials that become thicker or more viscous when force is applied to them. They are also known as shear-thickening fluids because their viscosity increases when there is shear stress applied to them. This is the opposite of a pseudo-plastic fluid, which becomes thinner when shear stress is applied to it.

When force is applied to quicksand, its particles move farther apart from each other, causing the sand to become thicker and more viscous. This is because the water that saturates the sand is pushed out and the sand particles become more tightly packed. This makes it difficult for anything to move through quicksand, including a person or object that is sinking in it.

Conclusion.

Quicksand is a type of dilatant fluid because it becomes thicker and more viscous when force is applied to it. This unique behavior is what makes it dangerous and difficult to navigate. Understanding the properties of quicksand can help engineers and scientists develop ways to mitigate its risk and prevent accidents from occurring.
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