16. Forces and Shear Stress in Fluids
The chapter discusses the dynamics of fluids, focusing on the relationship between shear stress, pressure, and viscosity, along with the calculation of forces due to these factors. It explores the implications of Reynolds number and Euler number in different flow scenarios, including laminar flow over a sphere and aerodynamic drag on automobiles. It emphasizes the application of fluid mechanics in diverse fields such as economic modeling.
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What we have learnt
- Understanding the relationship between viscosity, shear stress, and pressure in fluid dynamics.
- Calculating power requirements for prototypes based on model testing in wind tunnels.
- Applying Reynolds and Euler numbers to analyze forces in fluid flow scenarios.
Key Concepts
- -- Reynolds Number
- A dimensionless quantity that helps predict flow patterns in different fluid flow situations, calculated as the ratio of inertial forces to viscous forces.
- -- Euler Number
- A dimensionless number that represents the ratio of pressure forces to inertial forces in a fluid flow.
- -- Dynamic Similarity
- Condition under which two flows are characterized by the same Reynolds number and maintain a similar flow pattern, allowing for the use of model testing to predict prototype behavior.
- -- Laminar Flow
- A type of fluid flow where the fluid moves in smooth paths or layers, characterized by very low Reynolds numbers.
Additional Learning Materials
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