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Example on Wall Shear Stress Video Lecture | Fluid Mechanics for Mechanical Engineering
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FAQs on Example on Wall Shear Stress Video Lecture - Fluid Mechanics for Mechanical Engineering
| 1. What is wall shear stress in mechanical engineering? |  |
Ans. Wall shear stress in mechanical engineering refers to the force per unit area acting tangentially along the surface of a solid boundary, such as a wall. It is caused by the flow of a fluid and is an important parameter in the analysis and design of various mechanical systems.
| 2. How is wall shear stress calculated? | |
Ans. Wall shear stress can be calculated using the formula τ = μ(dv/dy), where τ represents the wall shear stress, μ is the dynamic viscosity of the fluid, and (dv/dy) is the velocity gradient perpendicular to the flow direction at the wall.
| 3. What factors affect wall shear stress? | |
Ans. Several factors can influence the wall shear stress in mechanical engineering. These include the viscosity of the fluid, the velocity of the flow, the roughness of the wall surface, the shape of the object, and the temperature of the fluid.
| 4. Why is wall shear stress important in mechanical engineering? | |
Ans. Wall shear stress is important in mechanical engineering because it plays a crucial role in determining the frictional forces between a fluid and a solid boundary. It affects the flow characteristics of fluids, such as pressure drop, heat transfer, and drag forces, which are essential in the design and analysis of various mechanical systems.
| 5. How can wall shear stress be controlled or reduced in mechanical systems? | |
Ans. Wall shear stress can be controlled or reduced in mechanical systems by employing various techniques. Some common methods include using lubricants or coatings on the wall surface to reduce friction, optimizing the shape of the object to minimize flow separation, reducing the fluid velocity, and smoothing out the surface roughness of the wall. These measures help in minimizing the detrimental effects of high wall shear stress on mechanical systems.
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Dec 22, 2024 Last updated |
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