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Fluid Mechanics 01 Properties of fluid Video Lecture | Crash Course: Civil Engineering (CE)
FAQs on Fluid Mechanics 01 Properties of fluid Video Lecture - Crash Course: Civil Engineering (CE)
| 1. What are the properties of fluid in fluid mechanics? |  |
Ans. The properties of fluid in fluid mechanics include density, viscosity, surface tension, compressibility, and temperature. Density is the mass per unit volume of a fluid, viscosity is the measure of a fluid's resistance to flow, surface tension is the force that acts on the surface of a liquid and tends to minimize its area, compressibility is the measure of how much a fluid volume decreases under pressure, and temperature affects the viscosity and density of a fluid.
| 2. How is density of a fluid defined in fluid mechanics? | |
Ans. The density of a fluid is defined as the mass per unit volume of the fluid. It is usually denoted by the symbol ρ (rho) and is expressed in units of kilograms per cubic meter (kg/m³) in the SI system. The density of a fluid determines its buoyancy and affects its behavior under different flow conditions.
| 3. What is viscosity and why is it important in fluid mechanics? | |
Ans. Viscosity is the measure of a fluid's resistance to flow. It determines how easily a fluid can be deformed and how it flows past solid surfaces or through pipes and channels. Viscosity is important in fluid mechanics because it affects the frictional forces between fluid layers, which in turn influence the flow behavior and efficiency of various fluid systems such as pumps, turbines, and pipelines.
| 4. How does surface tension impact the behavior of fluids? | |
Ans. Surface tension is the force that acts on the surface of a liquid and tends to minimize its area. It is caused by the cohesive forces between the molecules of the liquid. Surface tension affects the behavior of fluids by causing liquids to form droplets, exhibit capillary rise or depression in narrow tubes, and create a meniscus in containers. It also affects the wetting and spreading of liquids on solid surfaces.
| 5. Does temperature affect the properties of fluids in fluid mechanics? | |
Ans. Yes, temperature has a significant impact on the properties of fluids in fluid mechanics. It affects the viscosity and density of a fluid. Generally, as the temperature increases, the viscosity of most fluids decreases, making them flow more easily. On the other hand, the density of most fluids decreases with increasing temperature, causing them to expand and become less dense. These temperature-dependent changes in fluid properties play a crucial role in various engineering applications and natural phenomena.
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